Launched in 2008 by Tom Preston-Werner, Chris Wanstrath and PJ Hyett, GitHub is a web-based hosting service for software development projects that use the Git revision control system.
GitHub provides paid plans for private repositories and free accounts for open-source projects. The site allows users to participate in conversations to discuss, manage or review code. It also is useful for non-code files like Final Cut or Word documents. GitHub also offers social networking functions.