There's also gitlab, which is a github style app you can run locally. It used to use gitolite internally for access control, but it is now using its own access control system.
I've used both. Gitolite does everything on the command-line, including access management.
Gitlab is essentially an open-source clone of Github's web UI. Of the two projects, I think Gitlab is harder to deploy and far more resource-intensive on the server, but easier for users.
