GPL-2.0 License Open Source Tools

Admidio is a free open source user management system for websites of organizations and groups. The system has a flexible role model so that it’s possible to reflect the structure and permissions of your organization.

Easy to use but advanced IP PBX system, VoIP gateway and conference server.

Comprehensive CMS for small to medium sized businesses and non-profits.

Closed-circuit television (CCTV) software application which supports IP and Analog cameras.

Powerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profiles, activity streams, user groups, and more.

A fast lightweight web interface for git repositories.

A peer-to-peer chat app that is serverless, decentralized, and ephemeral.

Open source content management system, faster and easier management of website contents, scalable for small businesses to large corporations.

Create conference and event websites built on top of Drupal.

The Common Unix Print System uses Internet Printing Protocol (IPP) to support printing to local and network printers.

Web-based list management system that can be used for announcement lists and/or discussion lists.

Server for calendar sharing (CalDAV) that uses a PostgreSQL database as a data store.

Minimal Debian OS optimized for single-board computers, which allows you to easily install and manage several services for selfhosting at home.

Dim is a self-hosted media manager fueled by dark forces. With minimal setup, Dim will organize and beautify your media collections, letting you access and play them anytime from anywhere.

Advanced forum / community solution based on Ruby and JS.

A system for running a programming contest, like the ICPC regional and world championship programming contests.

Easy to use, lightweight, standards-compliant wiki engine with a simple syntax allowing reading the data outside the wiki. All data is stored in plain text files, therefore no database is required.

Advanced open source content management platform.

Take control over your blog.

Drupal Commerce is a popular e-commerce module for Drupal CMS, with support for dozens of payment, shipping, and shopping related modules.

Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS.

Powerful open source social networking engine.

XMPP instant messaging server.

Highly-scalable software for libraries that helps library patrons find library materials, and helps libraries manage, catalog, and circulate those materials.

Web-based farm record keeping application.

A lightweight, easy-to-set-up flat-file blogging engine.

Web-based open source GUI that controls and manages Asterisk.

Gerbera is an UPnP Media Server. It allows you to stream your digital media throughout your home network and listen to/watch it on a variety of UPnP compatible devices.

Genealogy software. It comes with a Web interface and can be used off-line or as a Web service.

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.

Gitolite allows you to setup git hosting on a central server, with fine-grained access control and many more powerful features.

Real-time web log analyzer and interactive viewer that runs in a terminal.

Assets management and booking for small/medium companies.

Streaming audio/video server which can be used to create an Internet radio station or a privately running jukebox and many things in between.

Anonymously share files, browse and publish (web sites accessible only through Hyphanet) and chat on forums.

Modular IRC server written in C++ for Linux, BSD, Windows, and macOS.

Advanced Content Management System (CMS).

Modular SIP server (registrar/proxy/router/etc).

Media server for audio, video, books, comics, and photos with a sleek interface and robust transcoding capabilities. Almost all modern platforms have clients, including Roku, Android TV, iOS, and Kodi.

Multimedia/Entertainment center, formerly known as XBMC. Runs on Android, BSD, Linux, macOS, iOS and Windows.

Integrated accounting and ERP system for small and midsize businesses, with double entry accounting, budgeting, invoicing, quotations, projects, orders and inventory management, shipping and more.

Leantime is a lean project management system for small teams and startups helping to manage projects from ideation through delivery.

Feature-rich Open Source web based polling software. Supports extensive survey logic.

Limbas is a database framework for creating database-driven business applications. As a graphical database frontend, it enables the efficient processing of data stocks and the flexible development of comfortable database applications.

Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.

Full-text search and data analytics, with fast response time for small, medium and big data (alternative to Elasticsearch).

Self hosted bug tracker, fits best for software development.

MediaWiki is a free and open-source wiki software package written in PHP. It serves as the platform for Wikipedia and the other Wikimedia projects, used by hundreds of millions of people each month.

MODX is an advanced content management and publishing platform. The current version is called ‘Revolution’.

Misago is fully featured modern forum application that is fast, scalable and responsive.

Mobile messaging platform with a focus on performance and scalability.

Daemon to remotely play music, stream music, handle and organize playlists. Many clients available.

Music streaming server with GUI management tools. Runs on Mac, Windows, and Linux.

Simple way to manage your todo list in AJAX style. Uses PHP, jQuery, SQLite/MySQL. GTD compliant.

Nextcloud preinstalled and preconfigured, with a text and web management interface and all the tools needed to self host private data. With installation images for Raspberry Pi, Odroid, Rock64, Docker, and a curl installer for Armbian/Debian.

Free, portable and lightweight Internet Relay Chat server for small or private networks.

Server application for geocoding (address -> coordinates) and reverse geocoding (coordinates -> address) on OpenStreetMap data.

A content request system for Plex/Emby, connects to SickRage, CouchPotato, Sonarr, with a growing feature set.

Web analytics framework that lets you stay in control of how you instrument and analyze the use of your websites and applications.

Securely and anonymously share a file of any size.

Open eClass is an advanced e-learning solution that can enhance the teaching and learning process.

OpenSIPS is an Open Source SIP proxy/server for voice, video, IM, presence and any other SIP extensions.

OrangeHRM is a comprehensive HRM system that captures all the essential functionalities required for any enterprise.

Collaborative project to create a free editable map of the world.

Open Source Social Network (OSSN) is a social networking software written in PHP. It allows you to make a social networking website and helps your members build social relationships, with people who share similar professional or personal interests.

Manage, organize and archive all your support requests and responses in one place.

Store and access data published by location tracking apps.

A lightweight, powerful, and flexible git-centric forge with features laying the foundation for federated and decentralized development.

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.

Photo gallery software for the web, built by an active community of users and developers.

Random Password Generator.

Upload files and assign them to specific clients you create. Give access to those files to your clients.

Non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk.

Free cross-platform bittorrent client with a feature rich Web UI for remote access.

Distributed IRC client, meaning that one (or multiple) client(s) can attach to and detach from a central core.

Simple media server software, with the aim of being fully compliant with DLNA/UPnP-AV clients. Formerly known as MiniDLNA.

An enterprise-grade issue tracking system.

Redmine is a flexible project management web application.

Secured and decentralized communication system. Offers decentralized chat, forums, messaging, file transfer.

World’s most popular free, open source ad serving system. Formerly known as OpenX Adserver and phpAdsNew.

RosarioSIS, free Student Information System for school management.

Fetches RSS/Atom-feeds and pushes new Content to any email-receiver, supports OPML.

Configurable open source project management, web-based application.

Allow remote clients to access image acquisition devices (scanners) available on the local host.

File hosting and sharing solution primary for teams and organizations.

Video surveillance management system.

A full web git interface with no javascript.

Another browser-based IMAP client.

Caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages.

Mailing list manager.

Lightweight document management system packed with all the features you can expect from big expensive solutions (Ex SismicsDocs).

Flexible, elegant and easy-to-use CMS.

The Battle for Wesnoth is an Open Source, turn-based tactical strategy game with a high fantasy theme, featuring both singleplayer and online/hotseat multiplayer combat.

Light-weight HTTP/HTTPS proxy daemon.

Web-based application to help you implement David Allen’s methodology.

Tuleap is a libre suite to plan, track, code and collaborate on software projects.

Modular, advanced and highly configurable IRC server written in C for Linux, BSD, Windows, and macOS.

Cross-platform multimedia player client and server supporting most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols.

Wiki, simple to use and install.

World’s most-used blogging and CMS engine.