IT Landscape for sysadmins

Protocols

IMAP/POP3

Dovecot ( http://www.dovecot.org/ )

IMAP and POP3 server written primarily with security in mind.

Cyrus ( http://cyrusimap.org/ )

Intended to be run on sealed servers, where normal users are not permitted to log in.

DBMail ( https://github.com/pjstevns/dbmail )

Fast and scalable email services, storage of mail messages in a relational database.

Qpopper ( http://www.eudora.com/products/unsupported/qpopper/ )

One of the oldest and most popular server implementations of POP3.

Courier ( http://www.courier-mta.org/imap/ )

Fast, scalable, enterprise IMAP and POP3 server.

HTTP

Nginx ( http://nginx.org/ )

Reverse proxy, load balancer, HTTP cache, and web server.

GWAN ( http://gwan.com )

Tiny, fast & efficient web & app server. All in one 300k executable.

Varnish ( https://www.varnish-cache.org/ )

HTTP based web application accelerator focusing on optimizing caching and compression.

Caddy ( https://caddyserver.com/ )

Caddy is a lightweight, general-purpose web server.

Apache ( http://httpd.apache.org/ )

Most popular web server.

Cherokee ( http://cherokee-project.com/ )

Lightweight, high-performance web server/reverse proxy.

HAProxy ( http://www.haproxy.org/ )

Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.

uWSGI ( https://github.com/unbit/uwsgi/ )

The uWSGI project aims at developing a full stack for building hosting services.

Tomcat ( http://tomcat.apache.org )

Apache Tomcat is an open source software implementation of the Java Servlet and JavaServer Pages technologies.

Lighttpd ( http://www.lighttpd.net/ )

Web server more optimized for speed-critical environments.

SMTP

Maildrop ( https://github.com/m242/maildrop )

Open Source disposable email SMTP server, also useful for development.

MailHog ( https://github.com/mailhog/MailHog )

Inspired by MailCatcher written in Go, SMTP MTA, web UI and retrieve them with the JSON API.

Haraka ( http://haraka.github.io/ )

A high-performance, pluginable SMTP server written in JavaScript.

Postfix ( http://www.postfix.org/ )

Fast, easy to administer, and secure Sendmail replacement.

iRedMail ( http://www.iredmail.org/ )

An open source mailserver solution.

MailDev ( http://djfarrelly.github.io/MailDev/ )

SMTP Server + Web Interface for viewing and testing emails during development.

OpenSMTPD ( https://opensmtpd.org/ )

Secure SMTP server implementation from the OpenBSD project.

Exim ( http://www.exim.org/ )

Message transfer agent (MTA) developed at the University of Cambridge.

Qmail ( http://cr.yp.to/qmail.html )

Secure Sendmail replacement.

MailCatcher ( http://mailcatcher.me/ )

Ruby gem that deploys a simply SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development.

Mailcow ( http://mailcow.email/ )

Mailcow is a mailserver suite.

Sendmail ( http://www.sendmail.com/sm/open_source/ )

Message transfer agent (MTA).

VBoxAdm ( http://www.vboxadm.net/ )

Web based GUI for E-Mail servers like Postfix and Dovecot.

hMailServer ( https://www.hmailserver.com )

hMailServer is a free, open source, e-mail server for Microsoft Windows.

DNS

PowerGate ( https://github.com/bobsta63/powergate )

PowerGate is a simple web application built for managing PowerDNS records.

PowerDNS ( https://www.powerdns.com/ )

DNS server with a variety of data storage back-ends and load balancing features.

Designate ( https://wiki.openstack.org/wiki/Designate )

DNS REST API that support several DNS servers as its backend.

NSD ( http://www.nlnetlabs.nl/projects/nsd/ )

Authoritative only, high performance, simple name server.

Bind ( https://www.isc.org/downloads/bind/ )

The most widely used name server software.

Knot ( https://www.knot-dns.cz/ )

High performance authoritative-only DNS server.

dnsmasq ( http://www.thekelleys.org.uk/dnsmasq/doc.html )

A lightweight service providing DNS, DHCP and TFTP services to small-scale networks.

Unbound ( http://unbound.net/ )

Validating, recursive, and caching DNS resolver.

Yadifa ( http://yadifa.eu/ )

Lightweight authoritative Name Server with DNSSEC capabilities powering the .eu top-level domain.

djbdns ( http://cr.yp.to/djbdns.html )

A collection of DNS applications, including tinydns.

TinyDNS ( https://cr.yp.to/djbdns/tinydns.html )

TinyDNS is an lightweight nameserver which is easy to setup.

LDAP

Fusion Directory ( http://www.fusiondirectory.org )

Improve the Management of the services and the company directory based on OpenLDAP.

pGina ( http://pgina.org/ )

Pluggable credential Provider.

OpenLDAP ( http://openldap.org/ )

Developed by the OpenLDAP Project.

FreeIPA ( http://www.freeipa.org )

FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate System).

OpenDJ ( http://opendj.forgerock.org/ )

Fork of OpenDS.

389 Directory Server ( http://port389.org )

Developed by Red Hat.

OpenDS ( https://opends.java.net/ )

Another directory server written in Java.

Apache Directory Server ( http://directory.apache.org/ )

Apache Software Foundation project written in Java.

SSH

autossh ( http://www.harding.motd.ca/autossh/ )

Automatically respawn ssh session after network interruption.

ssh-cert-authority ( https://github.com/cloudtools/ssh-cert-authority )

A democratic SSH certificate authority.

DSH ( http://www.netfort.gr.jp/~dancer/software/dsh.html.en )

Dancer’s shell / distributed shell – Wrapper for executing multiple remote shell commands from one command line.

sshmux ( https://github.com/joushou/sshmux )

SSH multiplexing library, allowing you to write "jump host" style proxies.

Clustershell ( http://cea-hpc.github.io/clustershell/ )

Run commands on multiple hosts in parallel. Clustershell can operate on predefined groups of hosts.

Mosh ( http://mosh.mit.edu/ )

The mobile shell.

putty ( http://www.chiark.greenend.org.uk/~sgtatham/putty/ )

Free and open source terminal emulator.

Dropbear ( https://matt.ucc.asn.au/dropbear/dropbear.html )

Dropbear is a relatively small SSH server and client. It runs on a variety of POSIX-based platforms.NEW

VPN

FreeLan ( https://github.com/freelan-developers/freelan )

Full-mesh, secure, easy-to-setup, multi-platform, open-source, highly-configurable VPN software.

SoftEther ( https://www.softether.org/ )

Multi-protocol software VPN with advanced features.

Pritunl ( http://pritunl.com/ )

OpenVPN based solution. Easy to set up.

tinc ( http://www.tinc-vpn.org/ )

Distributed p2p VPN.

PeerVPN ( https://github.com/peervpn/peervpn )

Virtual network built by PeerVPN uses a full mesh topology.

strongSwan ( http://www.strongswan.org/ )

Complete IPsec implementation for Linux.

OpenVPN ( https://community.openvpn.net )

Uses a custom security protocol that utilizes SSL/TLS for key exchange.

Cloud and Virtualization

Cloud Computing

OpenNode ( http://opennodecloud.com )

Builds open-source infrastructure management software and implements cloud systems.

The Foreman ( http://theforeman.org/ )

Foreman is a complete lifecycle management tool for physical and virtual servers. FOSS.

OpenStack ( https://www.openstack.org/ )

Open source software for building private and public clouds.

Tsuru ( https://tsuru.io )

Tsuru is an extensible and open source Platform as a Service software.

OpenNebula ( http://opennebula.org/ )

An user-driven cloud management platform for sysadmins and devops.

CoreOS ( https://coreos.com/ )

Open Source Projects for Linux Containers

Cracow Cloud One ( https://github.com/cc1-cloud/cc1/ )

The CC1 system provides a complete solution for Private Cloud Computing.

Flynn ( https://flynn.io )

Open source PaaS

Archipel ( http://archipelproject.org/ )

Manage and supervise virtual machines using Libvirt.

Mesos ( http://mesos.apache.org/ )

Develop and run resource-efficient distributed systems.

Cobbler ( http://www.cobblerd.org/ )

Cobbler is a Linux installation server that allows for rapid setup of network installation environments.

OpenShift ( http://www.openshift.org )

OpenShift is a platform as a service product from Red Hat.

CloudStack ( http://cloudstack.apache.org/ )

Cloud computing software for creating, managing, and deploying infrastructure cloud services.

Project-FiFo ( https://project-fifo.net )

Open source SmartOS cloud management with a focus on availability.

AppScale ( http://github.com/AppScale/appscale )

Open source cloud software with Google App Engine compatibility.

Eucalyptus ( https://www.eucalyptus.com/ )

Open source private cloud software with AWS compatibility.

Cloud Orchestration

Mina ( http://nadarei.co/mina/ )

Really fast deployer and server automation tool (rake based).

Overcast ( http://andrewchilds.github.io/overcast/ )

Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH.

Rundeck ( http://rundeck.org/ )

Simple orchestration tool.

Rocketeer ( http://rocketeer.autopergamene.eu/ )

PHP task runner and deployment tool.

SaltStack ( http://www.saltstack.com/ )

Extremely fast and scalable systems and configuration management software.

BOSH ( http://docs.cloudfoundry.org/bosh/ )

IaaS orchestration platform originally written for deploying and managing Cloud Foundry PaaS, but also useful for general purpose distributed systems.

Juju ( https://juju.ubuntu.com/ )

Cloud orechestration tool which manages services as charms, YAML configuration and deployment script bundles.

MCollective ( http://puppetlabs.com/mcollective )

Ruby framework to manage server orchestration, developed by Puppet labs.

Cloudify ( http://www.getcloudify.org/ )

Open source TOSCA-based cloud orchestration software platform written in Python and YAML.

StackStorm ( http://stackstorm.com/ )

Event Driven Operations and ChatOps platform for infrastructure management. Written in Python.

Marathon ( https://mesosphere.github.io/marathon/ )

A cluster-wide init and control system for services in cgroups or Docker containers.

CloudSlang ( http://www.cloudslang.io )

Flow-based orchestration tool for managing deployed applications, with Docker capabilities.

Capistrano ( http://www.capistranorb.com/ )

Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based).

Xen Orchestra ( https://xen-orchestra.com )

Xen Orchestra offers a powerful web UI for controlling a complete XenServer or Xen infrastructure.

Cloud Storage

sandstorm ( https://github.com/sandstorm-io/sandstorm )

Personal Cloud Sandbox, install apps to create documents, spreadsheets, blogs, git repos, task lists and more.

Syncthing ( http://syncthing.net/ )

Open Source system for private, encrypted and authenticated distrobution of data.

Nextcloud ( https://nextcloud.com/ )

Next cloud is a fork of OwnCloud.

Pydio ( https://pyd.io )

Pydio is a mature open source software solution for file sharing and synchronization.

ownCloud ( https://owncloud.org )

Provides universal access to your files via the web, your computer or your mobile devices.

Seafile ( http://seafile.com )

Another Open Source Cloud Storage solution.

Swift ( http://docs.openstack.org/developer/swift/ )

A highly available, distributed, eventually consistent object/blob store.

git-annex assistant ( http://git-annex.branchable.com/assistant/ )

A synchronised folder on each of your OSX and Linux computers, Android devices, removable drives, NAS appliances, and cloud services.

SparkleShare ( http://sparkleshare.org/ )

Provides cloud storage and file synchronization services. By default, it uses Git as a storage backend.

Virtualization

Ganeti ( https://code.google.com/p/ganeti/ )

Cluster virtual server management software tool built on top of KVM and Xen.

Proxmox ( http://pve.proxmox.com/wiki/Main_Page )

Open Source Server Virtualization Platform, based on KVM and OpenVZ.

Xen ( http://www.xenproject.org/ )

Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.

Packer ( http://www.packer.io/ )

A tool for creating identical machine images for multiple platforms from a single source configuration.

oVirt ( http://www.ovirt.org/ )

Manages virtual machines, storage and virtual networks.

LXC – Linux Containers ( https://linuxcontainers.org/ )

System containers which offer an environment as close to possible as the one you’d get from a VM, but without the overhead that comes with running a separate kernel and simulating all the hardware.

rkt ( https://coreos.com/rkt/docs/latest/ )

A fast, composable, and secure App Container runtime for Linux.

KVM ( http://www.linux-kvm.org )

Linux kernel virtualization infrastructure.

Vagrant ( https://www.vagrantup.com/ )

Tool for building complete development environments.

VirtualBox ( https://www.virtualbox.org/ )

Virtualization product from Oracle Corporation.

Software Containers

SmartOS ( https://smartos.org/ )

SmartOS is a hypervisor.

Flocker ( https://github.com/ClusterHQ/flocker )

Flocker is an open-source Container Data Volume Manager for your Dockerized applications.

Rancher ( http://rancher.com/ )

A complete infrastructure platform for running Docker in production.

Kubernetes ( http://kubernetes.io/ )

Kubernetes is an open source orchestration system for Docker containers.

Docker ( http://www.docker.com/ )

Open platform for developers and sysadmins to build, ship, and run distributed applications.

OpenVZ ( http://openvz.org )

Container-based virtualization for Linux.

ElasticKube ( https://elastickube.com )

Enterprise container management for Kubernetes

Messaging

Log Management

Octopussy ( http://www.octopussy.pm )

Log Management Solution (Visualize / Alert / Report).

Kibana ( http://www.elasticsearch.org/overview/kibana/ )

Visualize logs and time-stamped data.

Flume ( https://flume.apache.org/ )

Distributed log collection and aggregation system.

Graylog2 ( http://graylog2.org/ )

Pluggable Log and Event Analysis Server with Alerting options.

Fluentd ( http://www.fluentd.org/ )

Log Collector and Shipper.

Heka ( http://hekad.readthedocs.org/en/latest/ )

Stream processing system which may be used for log aggregation.

Logstash ( http://logstash.net/ )

Tool for managing events and logs.

Solr ( http://lucene.apache.org/solr/ )

Solr is fast search platform built on Apache Lucene.

ElasticSearch ( http://www.elasticsearch.org/ )

A Lucene Based Document store mainly used for log indexing, storage and analysis.

Queuing

Gearman ( http://gearman.org/ )

Fast multi-language queuing/job processing platform.

ZeroMQ ( http://zeromq.org/ )

Lightweight queuing system.

RabbitMQ ( http://www.rabbitmq.com/ )

Robust, fully featured, cross distro queuing system.

NSQ ( http://nsq.io/ )

A realtime distributed messaging platform.

BeanstalkD ( http://kr.github.io/beanstalkd/ )

A simple, fast work queue.

Apache Kafka ( http://kafka.apache.org )

A high-throughput distributed messaging system.

ActiveMQ ( https://activemq.apache.org )

Open source java message broker

Sidekiq ( https://github.com/mperham/sidekiq )

Simple, efficient background processing for Ruby.

QPid ( https://qpid.apache.org/ )

Apache QPid, open source AMQP 1.0 Server and framework.

Memcached ( https://memcached.org/ )

Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering.NEW

Storage

Cloning

Redo Backup ( http://redobackup.org/ )

Easy Backup, Recovery and Restore.

Fog ( http://www.fogproject.org/ )

Another computer cloning solution.

Clonezilla ( http://clonezilla.org/ )

Partition and disk imaging/cloning program.

OPSI ( http://www.opsi.org )

OPSI is an open source Client Management System for Windows clients and is based on Linux servers

Backups

Elkarbackup ( https://github.com/elkarbackup/elkarbackup )

Backup solution based on RSnapshot with a simple web interface.

ZBackup ( http://zbackup.org/ )

A versatile deduplicating backup tool

Burp ( http://burp.grke.org/ )

Network backup and restore program.

Obnam ( http://obnam.org/ )

Network backup and restore, with snapshotting, deduplication and encryption.

Backupninja ( https://labs.riseup.net/code/projects/backupninja )

Lightweight, extensible meta-backup system.

Bareos ( https://www.bareos.org/ )

A fork of Bacula backup tool.

BorgBackup ( https://borgbackup.readthedocs.org/en/stable/# )

BorgBackup is a deduplicating backup program.

Yadis! Backup ( http://www.codessentials.com/ )

Yadis! Backup is a real time Backup application.

UrBackup ( http://www.urbackup.org/ )

Another client-server backup system.

Lsyncd ( https://github.com/axkibe/lsyncd )

Watches a local directory trees for changes, and then spawns a process to synchronize the changes. Uses rsync by default.

Amanda ( http://www.amanda.org/ )

Client-server model backup tool.

Bacula ( http://www.bacula.org )

Another Client-server model backup tool.

Rsnapshot ( http://www.rsnapshot.org/ )

Filesystem Snapshotting Utility.

Backuppc ( http://backuppc.sourceforge.net/ )

Client-server model backup tool with file pooling scheme.

Duplicity ( http://duplicity.nongnu.org/ )

Encrypted bandwidth-efficient backup using the rsync algorithm.

Snebu ( http://www.snebu.com )

Snebu is an efficient incremental snapshot style client/server disk-based backup system for Unix / Linux systems.

Attic ( https://attic-backup.org )

Attic is a deduplicating backup program written in Python.

Relax and Recover ( http://relax-and-recover.org/ )

Bare metal backup software.

Cobian Backup ( http://www.cobiansoft.com/cobianbackup.htm )

Cobian Backup is a easy Backup software.

SafeKeep ( http://safekeep.sourceforge.net/ )

Centralized pull-based backup using rdiff-backup.

Duplicati ( http://www.duplicati.com )

Duplicati is a backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers.

Duply ( http://duply.net/ )

Duply is a frontend for duplicity, which is python based shell application that makes encrypted incremental backups to remote storages.

rdiff-backup ( http://www.nongnu.org/rdiff-backup/ )

Incremental File Backup software.

Deja Dup ( https://launchpad.net/deja-dup )

Deja Dup is a simple backup tool with GUI.

Box Backup ( https://www.boxbackup.org/ )

Is another backup system.

kvmBackup ( https://github.com/bioinformatics-ptp/kvmBackup )

A software for snapshotting KVM images and backing them up.NEW

Distributed Filesystems

GlusterFS ( http://www.gluster.org/ )

Scale-out network-attached storage file system.

XtreemFS ( http://www.xtreemfs.org/ )

XtreemFS is a fault-tolerant distributed file system for all storage needs.

Ceph ( http://ceph.com/ )

Distributed object store and file system.

Sheepdog ( https://sheepdog.github.io/sheepdog/ )

Sheepdog is a distributed object storage system for volume and container services and manages the disks and nodes intelligently.

MooseFS ( http://www.moosefs.org/ )

Fault tolerant, network distributed file system.

DRBD ( http://www.drbd.org/ )

Disributed Replicated Block Device.

LeoFS ( http://leo-project.net )

Unstructured object/data storage and a highly available, distributed, eventually consistent storage system.

MogileFS ( http://mogilefs.org/ )

Application level, network distributed file system.

TahoeLAFS ( https://tahoe-lafs.org/trac/tahoe-lafs )

secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system.

Lustre ( http://lustre.opensfs.org/ )

A type of parallel distributed file system, generally used for large-scale cluster computing.

OpenAFS ( http://www.openafs.org/ )

Distributed network file system with read-only replicas and multi-OS support.

BeeGFS ( http://www.beegfs.com/content/ )

BeeGFS is the leading parallel cluster file system, developed with a strong focus on performance.

HDFS ( http://hadoop.apache.org/ )

Distributed, scalable, and portable file-system written in Java for the Hadoop framework.

RDBMS

Firebird ( http://www.firebirdsql.org/ )

True universal open source database.

PostgreSQL-XL ( http://www.postgres-xl.org/ )

Scalable Open Source PostgreSQL-based database cluster.

MariaDB ( https://mariadb.org/ )

Community-developed fork of the MySQL.

Galera ( http://galeracluster.com/ )

Galera Cluster for MySQL is an easy-to-use high-availability solution with high system up-time, no data loss, and scalability for future growth.

Crate ( https://crate.io/ )

Another easy to use, fast and scalable database system.

TokuDB ( http://www.tokutek.com/tokudb-for-mysql/ )

TokuDB is an open source, high-performance storage engine for MySQL, MariaDB, and Percona Server that dramatically improves scalability and operational efficiency.

Percona Server ( http://www.percona.com/software )

Enhanced, drop-in MySQL replacement.

MySQL ( http://dev.mysql.com/ )

Most popular RDBMS server.

SQLite ( http://sqlite.org/ )

Library that implements a self-contained, serverless, zero-configuration, transactional SQL DBS.

PostgreSQL ( http://www.postgresql.org/ )

Object-relational database management system (ORDBMS).

NoSQL

Redis ( http://redis.io/ )

Networked, in-memory, key-value data store with optional durability.

LevelDB ( https://code.google.com/p/leveldb/ )

Google’s high performance key/value database.

MongoDB ( http://www.mongodb.org/ )

Another document-oriented database system.

CouchDB ( http://couchdb.apache.org/ )

Ease of use, with multi-master replication document-oriented database system.

Hypertable ( http://hypertable.org/ )

C++ based BigTable-like DBMS, communicates through Thrift and runs either as stand-alone or on distributed FS such as Hadoop.

FlockDB ( https://github.com/twitter/flockdb )

Twitter’s distributed, fault-tolerant graph database.

Apache HBase ( http://hbase.apache.org/ )

Hadoop database, a distributed, big data store.

RavenDB ( http://ravendb.net/ )

Document based database with ACID/Transactional features.

Riak ( http://basho.com/riak/ )

Another fault-tolerant key-value NoSQL database.

Neo4j ( http://www.neo4j.org/ )

Open source graph database.

OrientDB ( http://orientdb.com )

Multi-Model Database, mainly Graph Database.

RethinkDB ( http://www.rethinkdb.com/ )

Open source distributed document store database, focuses on JSON.

Cassandra ( http://cassandra.apache.org/ )

Distributed DBMS designed to handle large amounts of data across many servers.

Monitoring

Statistics

Piwik ( http://piwik.org/ )

Free and open source web analytics application.

GoAccess ( http://goaccess.io/ )

Open source real-time web log analyzer and interactive viewer that runs in a terminal.

Webalizer ( http://www.webalizer.org/ )

Fast, free web server log file analysis program.

Monitoring

Log.io ( http://logio.org/ )

Real-time log monitoring.

Bloonix ( https://bloonix.org )

Bloonix is your next-gen monitoring solution!

Sensu ( http://sensuapp.org/ )

Open source monitoring framework.

Shinken ( http://www.shinken-monitoring.org/ )

Another monitoring framework.

Zabbix ( http://www.zabbix.com/ )

Enterprise-class software for monitoring of networks and applications.

Adagios ( http://adagios.org/ )

Adagios is a web based Nagios configuration interface.

Dash ( https://github.com/afaqurk/linux-dash )

A low-overhead monitoring web dashboard for a GNU/Linux machine.

Alerta ( https://github.com/guardian/alerta )

Distributed, scaleable and flexible monitoring system.

zmon ( https://github.com/zalando/zmon )

ZMON is Zalando’s open-source platform monitoring tool.

Sentry ( https://getsentry.com/ )

Application monitoring, event logging and aggregation.

Icinga ( https://www.icinga.org/ )

Fork of Nagios.

Cacti ( http://www.cacti.net )

Web-based network monitoring and graphing tool.

PHP Server Monitor ( http://sourceforge.net/projects/phpservermon/ )

Open source tool to monitor your servers and websites

netdata ( https://github.com/firehol/netdata/ )

Real-time performance monitoring, done right!

Cabot ( http://cabotapp.com/ )

Monitoring and alerts, similar to PagerDuty.

Riemann ( http://riemann.io/ )

Flexible and fast events processor allowing complex events/metrics analysis.

Flapjack ( http://flapjack.io/ )

Monitoring notification routing & event processing system.

Monit ( http://mmonit.com/monit/#home )

Small Open Source utility for managing and monitoring Unix systems.

Nagios ( http://www.nagios.org/ )

Computer system, network and infrastructure monitoring software application.

Open Monitoring Distribution ( http://omdistro.org/ )

Monitoring solution based on Nagios.

BandwidthD ( http://bandwidthd.sourceforge.net/ )

BandwidthD tracks usage of TCP/IP network subnets and builds html files with graphs to display utilization.

Centreon ( https://www.centreon.com/en/ )

Centreon is real-time IT performance monitoring and diagnostics management tool.

LibreNMS ( https://github.com/librenms/librenms/ )

fork of Observium.

NetXMS ( http://www.netxms.org/ )

NetXMS is an enterprise grade multi-platform open source network management and monitoring system.

Selena ( https://github.com/allegro/selena )

Selena is a tool for monitoring website performance by monitoring response times, response codes and site content.

Monitorix ( http://www.monitorix.org/ )

Monitorix is a lightweight system monitoring tool.

Pandora FMS ( http://pandorafms.com/ )

Flexible Monitoring System, a Nagios and Zabbix alternative

check_mk ( http://mathias-kettner.com/check_mk.html )

Collection of extensions for Nagios.

Zenoss ( http://community.zenoss.org )

Application, server, and network management platform based on Zope.

OpenNMS ( http://www.opennms.org )

OpenNMS is enterprise grade network management application platform.

OpenITCockpit ( http://www.openitcockpit.org/en.html )

openITCockpit is an monitoring suite for the monitoring tool naemon.

MuninMX ( https://www.muninmx.com )

MuninMX is a collector and frontend replacement for the Open Source Munin Monitoring Tool and is compatible with deployed munin-nodes which it also uses.

Thruk ( http://www.thruk.org/ )

Multibackend monitoring webinterface with support for Naemon, Nagios, Icinga and Shinken.

Munin ( http://munin-monitoring.org/ )

Networked resource monitoring tool.

Naemon ( http://www.naemon.org/ )

Network monitoring tool based on the Nagios 4 core with performance enhancements and new features.

EyesOfNetwork ( https://www.eyesofnetwork.com )

EyesOfNetwork is the OpenSource solution combining a pragmatic usage of ITIL processes and a technological interface allowing their workaday application.

Observium ( http://www.observium.org/ )

SNMP monitoring for servers and networking devices. Runs on linux.

CactiEZ ( http://cactiez.cactiusers.org )

Monitoring tools with many features

weathermap ( https://network-weathermap.com/ )

Create your own live network maps from the network statistics you already haveNEW

Metric and Metric Collection

Prometheus ( http://prometheus.io/ )

An open-source service monitoring system and time series database.

Packetbeat ( http://packetbeat.com )

Captures network traffic and displays it in a custom Kibana dashboard for easy viewing.

Stashboard ( http://www.stashboard.org/ )

Status dashboard software.

Dashing ( http://dashing.io/ )

Ruby gem that allows for rapid statistical dashboard development. An all HTML5 approach allows for big screen displays in data centers or conference rooms.

Tessera ( https://github.com/urbanairship/tessera )

Easy to configure dashboard for Graphite

Cachet ( https://cachethq.io/ )

Status page system.

Graphite ( http://graphite.readthedocs.org/en/latest/ )

Open source scaleable graphing server.

Logstalgia ( http://logstalgia.io/ )

A website access visualiziation tool.

Statsd ( https://github.com/etsy/statsd/ )

Application statistic listener.

Collectl ( http://collectl.sourceforge.net/ )

High precision system performance metrics collecting tool.

Grafana ( http://grafana.org/ )

A Graphite & InfluxDB Dashboard and Graph Editor.

Smokeping ( https://oss.oetiker.ch/smokeping/ )

Network analytic tool.

Gource ( http://gource.io/ )

Gource is a software version control visualiziation tool.

Ganglia ( http://ganglia.sourceforge.net/ )

High performance, scalable RRD based monitoring for grids and/or clusters of servers. Compatible with Graphite using a single collection process.

InfluxDB ( http://influxdb.com/ )

Open source distributed time series database with no external dependencies.

Collectd ( http://collectd.org/ )

System statistic collection daemon.

RRDtool ( http://oss.oetiker.ch/rrdtool/ )

Open source industry standard, high performance data logging and graphing system for time series data.

DalmatinerDB ( https://dalmatiner.io )

Fast distributed metric store for high throughput environments.

OpenTSDB ( http://opentsdb.net/ )

Store and server massive amounts of time series data without losing granularity.

KairosDB ( https://code.google.com/p/kairosdb/ )

Fast distributed scalable time series database, fork of OpenTSDB 1.x.

Automation

Configuration Management

Ansible ( http://www.ansibleworks.com/ )

It’s written in Python and manages the nodes over SSH.

Boxstarter ( http://boxstarter.org )

Config management for Windows OS

Fabric ( http://www.fabfile.org/ )

Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.

Pallet ( http://palletops.com/ )

Infrastructure definition, configuration and management via a Clojure DSL.

Puppet ( http://puppetlabs.com/ )

It’s written in Ruby and uses Puppet’s declarative language or a Ruby DSL.

Chef ( http://www.opscode.com/chef/ )

It’s written in Ruby and Erlang and uses a pure-Ruby DSL.

CFEngine ( http://cfengine.com/ )

Lightweight agent system. Configuration state is specified via a declarative language.

Terraform ( http://www.terraform.io )

Terraform provides a common configuration to launch infrastructure from physical and virtual servers to email and DNS providers.

Configuration Management Database

Clusto ( https://github.com/clusto/clusto )

Helps you keep track of your inventory, where it is, how it’s connected, and provides an abstracted interface for interacting with the elements of the infrastructure.

iTop ( http://www.combodo.com/-Overview-.html )

A complete open source, ITIL, web based service management tool.

i-doit ( http://www.i-doit.org/ )

Open Source IT Documentation and CMDB.

Service Discovery

ZooKeeper ( http://zookeeper.apache.org/ )

ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.

Doozerd ( https://github.com/ha/doozerd )

Doozer is a highly-available, completely consistent store for small amounts of extremely important data.

Consul ( http://www.consul.io/ )

Consul is a tool for service discovery, monitoring and configuration.

etcd ( https://github.com/coreos/etcd )

A highly-available key value store for shared configuration and service discovery.

Network Configuration Management

Oxidized ( https://github.com/ytti/oxidized )

A modern take on network device configuration monitoring with web interace and GIT storage.

GestióIP ( http://www.gestioip.net/ )

An automated web based IPv4/IPv6 IP Address Management tool.

rConfig ( http://www.rconfig.com/ )

Another network device configuration management tool.

RANCID ( http://www.shrubbery.net/rancid/ )

Monitors network device’s configurarion and maintain history of changes.

trigger ( https://github.com/trigger/trigger )

Robust network automation toolkit written in Python.

PHPIpam ( http://phpipam.net/ )

Light, modern and useful web IP address management application

Netbox ( https://github.com/digitalocean/netbox )

NetBox is an IP address management (IPAM) and data center infrastructure management (DCIM) tool. Initially conceived by the network engineering team at DigitalOcean, NetBox was developed specifically to address the needs of network and infrastructure engineers.

Continuous Integration and Continuous Deployment

Go ( http://www.go.cd/ )

Open source continuous delivery server.

Drone ( https://github.com/drone/drone )

Continuous integration server built on Docker and configured using YAML files.

Jenkins ( http://jenkins-ci.org/ )

An extendable open source continuous integration server.

GitLab CI ( https://www.gitlab.com/gitlab-ci/ )

Based off of ruby. They also provide GitLab, which manages git repositories.

Buildbot ( http://buildbot.net/ )

Python-based toolkit for continuous integration.

Support software

Control Panels

Cockpit Project ( http://cockpit-project.org )

Cockpit makes it easy to administer your GNU/Linux servers via a web browser.

Senatora ( http://www.sentora.org/ )

Sentora provides a robust open-source web hosting control panel for small to medium ISPs.

Ajenti ( http://ajenti.org/ )

Control panel for Linux and BSD.

ZPanel ( http://www.zpanelcp.com/ )

Control panel for Linux, BSD, and Windows.

Lan Management System ( https://github.com/lmsgit/lms )

LAN Management System is a package of applications for managing LAN networks.

Webmin ( http://webmin.com/ )

Webmin is an individual Server Control Panel.

Panamax ( http://panamax.io/ )

An open-source project that makes deploying complex containerized apps as easy as Drag-and-Drop.

EasySCP ( http://www.easyscp.net/ )

EasySCP is another server webinterface.

tipboard ( https://github.com/allegro/tipboard )

Tipboard is a system for creating dashboards, written in JavaScript and Python.

ispmanager ( https://www.ispsystem.com/software/ispmanager-en )

Panel for shared web hosting

VestaCP ( http://www.vestacp.com/ )

Hosting panel for Linux but with Nginx.

PDNS Gui ( https://github.com/odoucet/pdns-gui )

Web based GUI which aids in administering domains and records for the PowerDNS with MySQL backend.

ISPConfig ( http://www.ispconfig.org )

Hosting control panel for Linux.

Calamari ( http://calamari.readthedocs.io/en/latest/ )

Calamari is a management and monitoring service for Ceph, exposing a high level REST API.

NethServer ( http://www.nethserver.org/ )

NethServer is an operating system for Linux enthusiasts, designed for small offices and medium enterprises.

Feathur ( http://feathur.com )

VPS Provisioning and Management Software.

WebVirtMgr ( https://retspen.github.io )

libvirt-based Web interface for managing virtual machines.

Centos Web Panel ( http://centos-webpanel.com/ )

Free CentOS Linux Web Hosting control panel designed for quick and easy management.

Atomia DNS ( http://atomiadns.com/ )

Free and open source DNS management system.

i-MSCP ( https://i-mscp.net/ )

Webhosting control panel.

Poweradmin ( http://www.poweradmin.org/ )

Friendly web-based DNS administration tool for PowerDNS server.

Glances ( https://nicolargo.github.io/glances/ )

Glances is a cross-platform curses-based system monitoring tool written in Python.

Bright Game Panel ( http://www.bgpanel.net/ )

Bright Game Panel is an open source gameserver control panel.

Froxlor ( http://www.froxlor.org/ )

Easy to use panel for Linux with Nginx and PHP-FPM support.

ViMbAdmin ( http://www.vimbadmin.net/ )

Provides a web based virtual mailbox administration system, allowing mail administrators to manage domains, mailboxes and aliases.

Easy-WI ( https://easy-wi.com/ )

Easy WI is a professional gameserver control panel.

Virtualmin ( http://www.virtualmin.com/ )

Control panel for Linux based on webmin.

Postfix Admin ( http://postfixadmin.sourceforge.net/ )

Web interface to manage postfix mailboxes, virtual domains and aliases.

OpenVZ Web Panel ( http://owp.softunity.com.ru/ )

Web panel to control your OpenVZ servers.

WebSVN ( http://www.websvn.info/ )

Opensource web subversion repository browser.

iF.SVNAdmin ( http://svnadmin.insanefactory.com/ )

WebGUI to manage Subversion repositories and User/Group permissions.

Webmails

Modoboa ( http://modoboa.org )

Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface. It provides useful components such as an administration panel or a webmail.

RainLoop ( http://www.rainloop.net )

Very nice webmail with IMAP/SMTP Support and multi accounting.

Mailpile ( https://www.mailpile.is/ )

A modern, fast web-mail client with user-friendly encryption and privacy features.

Citadel ( http://citadel.org )

Citadel is a free, open source groupware system.

Horde ( http://www.horde.org )

Webmail and groupware client.

Roundcube ( http://roundcube.net/ )

Browser-based IMAP client with an application-like user interface.

Newsletters

Servers for Hackers ( http://serversforhackers.com/ )

Newsletter for programmers who find themselves needing to know their way around a server.

LibreMailer ( https://github.com/averna-syd/LibreMailer )

Libre Mailer is a modest and simple web based email marketing application.

Lewsnetter ( https://github.com/bborn/lewsnetter )

E-mail marketing application, includes subscription management, delivery, bounce and complaint notification, templates and some stats.

phpList ( http://www.phplist.com/ )

Newsletter manager written in PHP.

Web Operations Weekly ( http://webopsweekly.com )

A weekly newsletter on Web operations, infrastructure, performance, and tooling, from the browser down to the metal.

DadaMail ( http://dadamailproject.com/ )

Mailing List Manager, written in Perl.

Project Management

OpenProject ( https://www.openproject.org )

Project collaboration with open source.

Taiga ( https://taiga.io/ )

Agile, Free, Open Source Project Management Tool based on the Kanban and Scrum methods.

Phabricator ( http://phabricator.org/ )

Written in PHP.

CaseBox ( https://www.casebox.org )

Manage all your organisation’s information in one system.

kanboard ( http://kanboard.net/ )

Kanboard is a project management software that uses the Kanban methodology.

Wekan ( http://wekan.io/ )

Wekan is an open-source and collaborative kanban board application.

Gogs ( http://gogs.io/ )

Written in Go.

GitBucket ( https://github.com/takezoe/gitbucket )

Clone of GitHub written in Scala.

Restyaboard ( http://restya.com/board/index.html )

Trello like kanban board. Restyaboard is based on Restya platform.

Kallithea ( http://kallithea-scm.org/ )

OpenSource Git and mercurial sources management.

Tuleap ( https://www.tuleap.org/ )

Tuleap, 100% Open Source software development and project management tool

Redmine ( http://www.redmine.org/ )

Written in ruby on rails.

GitLab ( https://www.gitlab.com/ )

Clone of GitHub written in Ruby.

Trac ( http://trac.edgewall.org/ )

Written in python.

Ticketing systems

osTicket ( http://osticket.com/ )

Open source support ticket system.

Cerb ( http://www.cerberusweb.com/ )

A group-based e-mail management project built with a commercial open source license.

Flyspray ( http://flyspray.org )

Web-based bug tracking system written in PHP.

Otrs ( http://www.otrs.com/ )

A free and open-source trouble ticket system software package that a company, organization, or other entity can use to assign tickets to incoming queries and track further communications about them.

Request Tracker ( http://www.bestpractical.com/rt/ )

Ticket-tracking system written in Perl.

MantisBT ( http://www.mantisbt.org/ )

Another web-based bug tracking system.

TheBugGenie ( http://www.thebuggenie.com )

Open source ticket system with extremely complete users rights granularity.

Bugzilla ( http://www.bugzilla.org/ )

General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.

Zammad ( http://zammad.org/ )

Zammad is an web-based ticket solution.NEW

IT Asset Management

Snipe IT ( http://snipeitapp.com/ )

Asset & license management software.

Ralph ( https://github.com/allegro/ralph )

Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.

RackTables ( http://racktables.org/ )

Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.

OCS Inventory NG ( http://www.ocsinventory-ng.org/en/ )

Enables users to inventory their IT assets.

GLPI ( http://www.glpi-project.org/spip.php?lang=en )

Information Resource-Manager with an additional Administration Interface.

Open-AudIT ( http://www.open-audit.org/index.php )

Open-AudIT is an application to tell you exactly what is on your network, how it is configured and when it changes.

FusionInventory ( http://fusioninventory.org/ )

Alternative to the OCS Inventory solution, allow to inventory IT assets.

CMDBuild ( http://www.cmdbuild.org )

CMDBuild is a web environment in which you can configure custom solutions for IT Governance, or more generally for asset management. NEW

Wikis

MoinMoin ( http://moinmo.in/ )

An advanced, easy to use and extensible WikiEngine with a large community of users.

XWiki ( http://www.xwiki.org/xwiki/bin/view/Main/WebHome )

XWiki is a professional wiki that has powerful extensibility features such as scripting in pages, plugins and a highly modular architecture.

TiddlyWiki ( http://tiddlywiki.com )

Complete interactive wiki in JavaScript.

Gollum ( https://github.com/gollum/gollum )

A simple, Git-powered wiki with a sweet API and local frontend.

DokuWiki ( https://www.dokuwiki.org/dokuwiki )

Simple to use and highly versatile wiki that doesn’t require a database.

ikiwiki ( http://ikiwiki.info/ )

A wiki compiler.

TWiki ( http://twiki.org/ )

TWiki – the Open Source Enterprise Wiki and Web Application Platform

Sphinx ( http://www.sphinx-doc.org/ )

Python Documentation Generator

Olelo Wiki ( https://github.com/minad/olelo )

A a wiki that stores pages in a Git repository.

TikiWiki ( https://tiki.org/ )

Free Wiki system.

PmWiki ( http://www.pmwiki.org )

Wiki-based system for collaborative creation and maintenance of websites.

Mediawiki ( http://www.mediawiki.org/wiki/MediaWiki )

Used to power Wikipedia.

Code Review

Review Board ( https://www.reviewboard.org/ )

Available as free software uner the MIT License.

Gerrit ( https://code.google.com/p/gerrit/ )

Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.

Collaborative Software

SOGo ( https://www.sogo.nu/ )

Collaborative software server with a focus on simplicity and scalability.

Mattermost ( http://www.mattermost.org/ )

Mattermost brings all your team communication into one place, making it searchable and accessible anywhere.

Kolab ( https://www.kolab.org )

Another groupware suite.

Horde Groupware ( http://www.horde.org/apps/groupware )

PHP based collaborative software suite that includes email, calendars, wikis, time tracking and file management.

Citadel/UX ( http://www.citadel.org/ )

Collaboration suite (messaging and groupware) that is descended from the Citadel family of programs.

Zimbra ( https://www.zimbra.com/community/ )

Collaborative software suite, that includes an email server and web client.

EGroupware ( http://www.egroupware.org/ )

Groupware software written in PHP.

Tine ( http://tine20.github.io/Tine-2.0-Open-Source-Groupware-and-CRM/ )

Tine is a groupware solution.

Communication

Kandan ( http://getkandan.com/ )

Open source self hosted Chat.

Lets-Chat ( http://sdelements.github.io/lets-chat/ )

A self hosted chat suite written in Node.

Hack.Chat ( https://hack.chat/ )

Chat for hacker from hackers 🙂

Openfire ( http://www.igniterealtime.org/projects/openfire/ )

Real time collaboration (RTC) server.

Jappix ( https://jappix.org/ )

Web-based chat client

Kaiwa ( http://getkaiwa.com )

Web based chat client in the style of common paid alternatives.

Metronome IM ( http://www.lightwitch.org/metronome )

Fork of Prosody IM.

Discord ( https://discordapp.com/ )

Is a voice and chat software and an alternative to Skype and Teamspeak.

Spreed.Me ( https://www.spreed.me/?far )

Spreed WebRTC implements a WebRTC audio/video call and conferencing server and web client.

Discourse ( http://www.discourse.org/ )

Civilsied discussions.

MongooseIM ( https://www.erlang-solutions.com/products/mongooseim-massively-scalable-ejabberd-platform )

Fork of ejabberd.

HumHub ( https://github.com/humhub/humhub/ )

Social communication network kit.

Rocket.Chat ( https://rocket.chat/ )

Web chat platform.

Tigase ( https://projects.tigase.org/projects/tigase-server )

XMPP server implementation in Java.

Alfresco ( https://www.alfresco.com/community )

The Alfresco Enterprise Content Management platform is an open, powerful ECM platform.

Prosody IM ( http://prosody.im/ )

XMPP server written in Lua.

Candy ( http://candy-chat.github.io/candy )

Multi user XMPP client written in Javascript.

ejabberd ( http://www.ejabberd.im/ )

XMPP instant messaging server written in Erlang/OTP.

Jitsi Meet ( https://jitsi.org/Projects/JitsiMeet )

Jitsi Meet is an OpenSource (MIT) WebRTC JavaScript application that uses Jitsi Videobridge to provide high quality, scalable video conferences.

Asterisk ( http://www.asterisk.org )

Asterisk is a Framework to build Telephony Servers, IVR, Voicemail and more

Matterm ( https://www.mattermost.org )

Open source Slack alternative.

Matrix ( http://matrix.org/ )

Matrix is an open standard for decentralised communication.NEW

Essentials

Editors

neovim ( http://neovim.org/ )

The Vim text editor has been loved by a generation of users. This is the next generation.

Lime ( http://limetext.org/ )

Aims to provide an open source solution to Sublime Text.

ICEcoder ( http://icecoder.net )

Code editor awesomeness, built with common web languages.

Light Table ( http://www.lighttable.com/ )

The next generation code editor.

Atom ( https://atom.io/ )

A hackable text editor from Github.

Haroopad ( http://pad.haroopress.com/ )

Markdown editor with live preview.

TextMate ( https://github.com/textmate/textmate/ )

A graphical text editor for OS X.

Vim ( http://www.vim.org )

A highly configurable text editor built to enable efficient editing.

Brackets ( http://brackets.io/ )

Open source code editor for web designers and front-end developers.

jotgit ( https://github.com/jdleesmiller/jotgit )

Git-backed real-time collaborative code editing.

Notepad++ ( https://notepad-plus-plus.org/ )

Notepad++ is a free source code editor and Notepad replacement that supports several languages.

Geany ( http://www.geany.org/ )

GTK2 text editor.

KDevelop ( https://www.kdevelop.org )

An open source IDE by the people behind KDE.

GNU Emacs ( http://www.gnu.org/software/emacs/ )

An extensible, customizable text editor-and more.

nano ( http://www.nano-editor.org/ )

GNU Nano is a clone of the Pico text editor with some enhancements.

NetBeans IDE ( https://netbeans.org )

NetBeans IDE lets you quickly and easily develop Java desktop, mobile, and web applications, as well as HTML5 applications with HTML, JavaScript, and CSS.

Eclipse ( http://eclipse.org/ )

IDE written in Java with an extensible plug-in system.

Repositories

Dotdeb ( http://www.dotdeb.org/ )

Repository with LAMP updated packages for Debian.

ElRepo ( http://elrepo.org/tiki/tiki-index.php )

The ELRepo Project focuses on hardware related packages to enhance your experience with Enterprise Linux.

Remi ( http://rpms.famillecollet.com/ )

Repository with LAMP updated packages for RHEL/Centos/Fedora.

Pulp ( http://www.pulpproject.org/ )

Pulp is a platform for managing repositories of content, such as software packages, and pushing that content out to large numbers of consumers.

SCM Manager ( https://www.scm-manager.org/ )

The easiest way to share and manage your Git, Mercurial and Subversion repositories.

EPEL ( https://fedoraproject.org/wiki/EPEL )

Repository for RHEL and compatibles (CentOS, Scientific Linux).

Software Collections ( https://www.softwarecollections.org/en/ )

Community Release of Red Hat Software Collections. Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.

IUS Community Project ( https://iuscommunity.org/pages/Repos.html )

A better way to upgrade RHEL.

RepoForge ( http://repoforge.org/ )

ex-RpmForge

Aptly ( https://www.aptly.info/ )

Mirror, create, snapshot and publish Debian repositories

Security

Bro ( http://www.bro.org )

Bro is a powerful framework for network analysis and security monitoring.

BlackBox ( https://github.com/StackExchange/blackbox )

Safely store secrets in Git/Mercurial. Privides tooling to automatically encrypt secrets like passwords.

Pass ( http://www.passwordstore.org/ )

Password manager based around gpg and git, with a bit of setup allowing easy collaboration.

OpenVAS ( http://www.openvas.org/vm.html )

Open source intrusion detection system

Linux Malware Detect ( https://www.rfxn.com/projects/linux-malware-detect/ )

A malware scanner for Linux designed around the threats faced in shared hosted environments.

LookingGlass ( https://github.com/telephone/LookingGlass )

LookingGlass for hosting on own server.

Vault ( https://www.vaultproject.io )

Vault secures, stores, and tightly controls access to tokens, passwords, certificates, API keys, and other secrets in modern computing.

RatticDB ( http://rattic.org/ )

RatticDB is a password management database.

Suricata ( http://suricata-ids.org/ )

Suricata is a high performance Network IDS, IPS and Network Security Monitoring engine.

OsSec ( http://www.ossec.net/ )

Open Source IDS

Vaultier ( https://www.vaultier.org/ )

Collaborative password manager that uses PKI

OPNsense ( https://opnsense.org/ )

OPNsense is an open source, easy-to-use and easy-to-build FreeBSD based firewall and routing platform.

Snort ( https://www.snort.org/ )

Snort is a free and open source network intrusion prevention system and network intrusion detection system.

OpenAS ( https://openas.org/ )

An self-hosted email spam filter.

MailBorder ( http://www.mailborder.com/ )

Free E-Mail Antivirus/Spam Gateway.

Fail2Ban ( http://www.fail2ban.org/wiki/index.php/Main_Page )

Scans log files and takes action on IPs that show malicious behavior.

Kali Linux ( https://www.kali.org/ )

Kali Linux is a Open Source Penetration software.

Rspamd ( https://rspamd.com/ )

Advanced spam filtering system that allows evaluation of messages by a number of rules including regular expressions, statistical analysis and custom services such as URL black lists.

PacketFence ( http://www.packetfence.org )

PacketFence is a fully supported, trusted, Free and Open Source network access control (NAC) solution.

AlienVault OSSIM ( https://www.alienvault.com/products/ossim )

OSSIM provides you with a feature-rich open source SIEM, complete with event collection, normalization and correlation.

WinMTR ( http://winmtr.net/ )

Free Network diagnostic tool.

EFA Project ( https://efa-project.org/ )

Great EMail Filter Appliance.

VyOS ( http://vyos.net/ )

VyOS is a community fork of Vyatta, a Linux-based network operating system that provides software-based network routing, firewall, and VPN functionality.

Untangle ( https://www.untangle.com/ )

Free firewall distribution based on debian with paid addons.

Denyhosts ( http://denyhosts.sourceforge.net/ )

Thwart SSH dictionary based attacks and brute force attacks.

pfSense ( https://www.pfsense.org/ )

Firewall and Router FreeBSD distribution.

Smoothwall ( http://www.smoothwall.org/ )

Software Firewall.

KeePass ( http://keepass.info/ )

Keepass is a great and secure password storage tool.

IPCop ( http://www.ipcop.org/ )

Secure firewall distribution.

OSQuery ( https://osquery.io )

Query your servers status and info using a SQL like interface.

Devil Linux ( http://www.devil-linux.org/home/index.php )

Security distribution which runs from a usb stick or cd.

ClamAV ( http://www.clamav.net/ )

Antivirus software

lcsam ( https://github.com/LiveConfig/lcsam )

Another Spamassassin milter.

rkhunter ( http://rkhunter.sourceforge.net/ )

Rootkit Hunter is a tool that scans for rootkits, backdoors and possible local exploits.

SpamAssassin ( https://spamassassin.apache.org/ )

A powerful and popular email spam filter employing a variety of detection techniques.

chkrootkit ( http://www.chkrootkit.org/ )

chkrootkit is a tool to locally check for signs of a rootkit.

BlackArch ( https://blackarch.org/ )

Is an excellent pentesting distribution.

ipfire ( http://www.ipfire.org/ )

IPFire, open source easy to use firewall.

Passbolt ( https://www.passbolt.com/ )

Secure password database for sharing in a team.NEW

Version control

GitKraken ( http://www.gitkraken.com )

Beautiful cross-platform Git client.

Fossil ( http://www.fossil-scm.org/ )

Distributed version control with built-in wiki and bug tracking.

Git ( http://git-scm.com/ )

Distributed revision control and source code management (SCM) with an emphasis on speed.

Mercurial ( http://mercurial.selenic.com/ )

Another distributed revision control.

GNU Bazaar ( http://bazaar.canonical.com/ )

Distributed revision control system sponsored by Canonical.

Subversion ( http://subversion.apache.org/ )

Client-server revision control system.

Packaging

omnibus-ruby ( https://github.com/opscode/omnibus-ruby )

Full stack, cross distro packaging software (Ruby).

FPM ( https://github.com/jordansissel/fpm )

Easily create any kind of package

Poky ( https://www.yoctoproject.org/tools-resources/projects/poky )

The Yocto Project provides templates, tools and methods to help you create custom Linux-based systems for embedded products.

Open Build Service ( http://openbuildservice.org/ )

A generic system to build and distribute packages from sources in an automatic, consistent and reproducible way.

Troubleshooting

Sysdig ( http://www.sysdig.org/ )

Capture system state and activity from a running Linux instance, then save, filter and analyze.

Wireshark ( http://www.wireshark.org/ )

The world’s foremost network protocol analyzer.

ngrep ( http://ngrep.sourceforge.net/ )

Best tool to grep over the network

Books

UNIX and Linux System Administration Handbook ( http://www.admin.com/ )

Approaches system administration from a practical perspective.

Cybrary ( https://www.cybrary.it/ )

Free security tutorials.

The Linux Command Line ( http://linuxcommand.org/tlcl.php )

A book about the Linux command line by William Shotts.

Debian Administrator HandBook ( https://debian-handbook.info/get/now/ )

This book teaches the essentials to anyone who wants to become an effective and independent Debian GNU/Linux administrator

The Practice of System and Network Administration ( http://everythingsysadmin.com/books.html )

The first and second editions describes the best practices of system and network administration, independent of specific platforms or technologies.

The Visible Ops Handbook: Implementing ITIL in 4 Practical and Auditable Steps ( http://www.itpi.org/the-visible-ops-handbook-review.html )

Is a methodology designed to jumpstart implementation of controls and process improvement.

The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win ( http://itrevolution.com/books/phoenix-project-devops-book/ )

How DevOps techniques can fix the problems that happen in IT organizations.

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