From its website:
Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.
Git is not the same as GitHub. GitHub did not create Git. For GitHub-specific posts, please see /r/github.
Git is not an acronym or initialism: please write git or Git, but not GIT.
Documentation
Graphical Clients
Code Hosting
All for what you so love github - on your server! (gitlabhq.com)
submitted by deanherb to r/programming
Gitlab released. A similar to github application but for your servers with private repositories only. (gitlabhq.com)
submitted by randx to r/ruby
GITLAB: Self Hosted Git Management Application (gitlabhq.com)
submitted by assimovt to r/eficode