While the site isn't open-source, they have open-sourced a ton of code. Just to name a few: http://github.com/github http://github.com/github http://github.c

While the site isn't open-source, they have open-sourced a ton of code. Just to name a few: http://github.com/github http://github.com/github http://github.com/defunkt/resque http://github.com/defunkt/resque http://github.com/mojombo/jekyll http://github.com/mojombo/jekyll http://github.com/mojombo/god http://github.com/mojombo/god http://github.com/mojombo/bert http://github.com/mojombo/bert http://github.com/mojombo/grit http://github.com/mojombo/grit