OSQA is the free, open source Q&A system you've been waiting for. Your OSQA site is more than just an FAQ page, it is a full-featured Q&A community. Users earn points and badges for useful participation, and ...

Stack Exchange is a fast-growing network of 84 [and counting] question and answer sites on diverse topics from software programming to cooking to photography and gaming. We are an expert knowledge exchange: a place where ...

Open source question and answer forum written in Python and Django

The Free Software Directory is a project of the Free Software Foundation (FSF) and United Nations Education, Scientific and Cultural Organization (UNESCO). We catalog useful free software that runs under free operating s ...

Super User is a Q&A site for computer enthusiasts that's free. Free to ask questions, free to answer questions, free to read, free to index, built with plain old HTML, no fake rot13 text on the home page, no scam ...

SourceForge is a web-based source code repository. It acts as a centralized location for software developers to control and manage open source software development. SourceForge repository hosts more than 230,000 projects ...

Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. Each virtual terminal provides the functions of the DEC VT100 terminal and, in addition ...

Server Fault is a Q&A site for system administrators and IT professionals that's free. Free to ask questions, free to answer questions, free to read, free to index, built with plain old HTML, no fake rot13 text o ...

Stack Overflow is a free, community-driven, reputation-based Q & A site for computer programmers. No membership is required to ask questions or provide answers to questions by others. Registered users collect 'ka ...

GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.Briefly, boot loader is the first software program that ru ...

A hosted suite of development tools. Subversion, GIT, bug tracking, wiki, continuous integration and publishing tool

Gitorious is a code hosting service under the Free Software GNU AGPL license. Gitorious is a great way of collaborating on distributed open source projects. Gitorious provides open source infrastructure for hosting open ...

Bitbucket is a code hosting site, for the Mercurial version control system. It provides a fully featured environment for managing development, including a wiki (naturally backed by Mercurial, you can clone it!), a powerf ...

GitHub is a web-based hosting service for projects that use the Git revision control system. It is written in Ruby on Rails by Logical Awesome developers Chris Wanstrath, PJ Hyett, and Tom Preston-Werner. GitHub offers b ...

Host open-source software projects using Subversion or Mercurial for revision control. Google Code also includes a wiki for documentation, issue tracking and file download feature. It is free for Open Source projects tha ...

GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. The features of GNU Emacs i ...

Launchpad is a collaboration and Bazaar code hosting platform for (primarily open-source) software projects. Hosting is free for public projects, but if you want private code branches, a private bugtracker, private teams ...