G
Wiki program that stores pages and uploaded files in a git repository, which can then be modified using the VCS command line tools or the wiki's web interface.
Self-hostedOpen sourceWikis
2,276GPL-2.0Haskellupdated Oct 2026
Z
Graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images.
Self-hostedOpen sourceWikis
2,206GPL-2.0Pythonupdated Oct 2026
P
Flat-forum bulletin board software solution that can be used to stay in touch with a group of people or can power your entire website.
Self-hostedOpen sourceCommunication - Social Networks and Forums
2,106GPL-2.0PHPupdated Oct 2026
Upload files and assign them to specific clients you create. Give access to those files to your clients.
Self-hostedOpen sourceFile Transfer - Single-click & Drag-n-drop Upload
2,035GPL-2.0PHPupdated Oct 2026
R
Secured and decentralized communication system. Offers decentralized chat, forums, messaging, file transfer.
Self-hostedOpen sourceCommunication - Custom Communication Systems
2,021GPL-2.0C++updated Oct 2026
Bug tracker, fits best for software development.
Self-hostedOpen sourceTicketing
1,810GPL-2.0PHPupdated Oct 2026
Server software which controls a wide range of Squeezebox/Slim Devices audio players and compatible hardware (formerly Logitech Media Server).
Self-hostedOpen sourceMedia Streaming - Audio Streaming
1,800GPL-2.0Perlupdated Oct 2026
The Common Unix Print System uses Internet Printing Protocol (IPP) to support printing to local and network printers.
Self-hostedOpen sourceMiscellaneous
1,787GPL-2.0Cupdated Oct 2026
M
Mobile messaging platform with a focus on performance and scalability.
Self-hostedOpen sourceCommunication - XMPP - Servers
1,758GPL-2.0Erlangupdated Oct 2026
E
Powerful open source social networking engine.
Self-hostedOpen sourceCommunication - Social Networks and Forums
1,676GPL-2.0PHPupdated Oct 2026
O
SIP proxy/server for voice, video, IM, presence and any other SIP extensions.
Self-hostedOpen sourceCommunication - SIP
1,544GPL-2.0Cupdated Oct 2026
R
Ad serving system. Formerly known as OpenX Adserver and phpAdsNew.
Self-hostedOpen sourceMiscellaneous
1,515GPL-2.0PHPupdated Oct 2026
M
Advanced content management and publishing platform. The current version is called 'Revolution'.
Self-hostedOpen sourceContent Management Systems (CMS)
1,414GPL-2.0PHPupdated Oct 2026
UPnP Media Server, which allows you to stream your digital media throughout your home network and listen to/watch it on a variety of UPnP compatible devices.
Self-hostedOpen sourceMedia Streaming - Multimedia Streaming
1,399GPL-2.0C++updated Oct 2026
F
Web-based farm record keeping application.
Self-hostedOpen sourceResource Planning
1,381GPL-2.0PHPupdated Oct 2026
H
Databaseless PHP blogging platform. A flat-file CMS that allows you to create a fast, secure, and powerful website or blog in seconds.
Self-hostedOpen sourceBlogging PlatformsContent Management Systems (CMS)
1,367GPL-2.0PHPupdated Jan 2026
Modular IRC server written in C++ for Linux, BSD, Windows, and macOS.
Self-hostedOpen sourceCommunication - IRC
1,357GPL-2.0C++updated Oct 2026
T
Web-based application to help you implement David Allen’s [Getting Things Done™](https://en.wikipedia.org/wiki/Getting_Things_Done) methodology.
Self-hostedOpen sourceTask Management & To-do Lists
1,239GPL-2.0Rubyupdated Aug 2026
H
Anonymously share files, browse and publish _freesites_ (web sites accessible only through Hyphanet) and chat on forums.
Self-hostedOpen sourceCommunication - Custom Communication Systems
1,228GPL-2.0Javaupdated Sept 2026
O
Store and access data published by [OwnTracks](https://owntracks.org/) location tracking apps.
Self-hostedOpen sourceMaps and Global Positioning System (GPS)
1,220GPL-2.0Cupdated Oct 2026
Powerful and advanced CMS with a large community.
Self-hostedOpen sourceContent Management Systems (CMS)
1,218GPL-2.0PHPupdated Oct 2026
R
Enterprise-grade issue tracking system.
Self-hostedOpen sourceTicketing
1,163GPL-2.0Perlupdated Oct 2026
B
Comprehensive CMS for small to medium sized businesses and non-profits.
Self-hostedOpen sourceContent Management Systems (CMS)
1,051GPL-2.0PHPupdated Oct 2026
D
System for running a programming contest, like the ICPC regional and world championship programming contests.
Self-hostedOpen sourceMiscellaneous
922GPL-2.0PHPupdated Oct 2026
T
Flexible, elegant and easy-to-use CMS.
Self-hostedOpen sourceContent Management Systems (CMS)
883GPL-2.0PHPupdated Oct 2026
Z
Open Source on Springrts engine. Zero-K is a traditional real time strategy game with a focus on player creativity through terrain manipulation, physics, and a large roster of unique units - all while being balanced to support competitive play.
Self-hostedOpen sourceGames
877GPL-2.0Luaupdated Oct 2026
Q
Distributed IRC client, meaning that one (or multiple) client(s) can attach to and detach from a central core.
Self-hostedOpen sourceCommunication - IRC
792GPL-2.0C++updated Jun 2026
D
POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client with an Exchange server, even from the internet or behind a firewall through Outlook Web Access.
Self-hostedOpen sourceCommunication - Email - Mail Delivery AgentsCalendar & Contacts
774GPL-2.0Javaupdated Oct 2026
Electronic document management system for your documents with preview generation, OCR, and automatic categorization among other features.
Self-hostedOpen sourceDocument Management
682GPL-2.0Dockerupdated Sept 2026
N
Portable and lightweight Internet Relay Chat server for small or private networks.
Self-hostedOpen sourceCommunication - IRC
582GPL-2.0Cupdated Oct 2026