Grove is a way for developers to share git repositories directly over HTTP, without needing a central service like GitHub to connect them. Developers can share as many repositories as they like, and don't need to push their changes or branches in order to share them. It offers a featureful but extremely lightweight web interface to allow directory and repository browsing, in addition to retrieval through git. Sharing your work is as simple hitting enter.
We may be better off not doing this. It depends on whether libgit2 is included in git distributions, and how difficult it is to link to it.