[git] Git Server Like GitHub?

If you just want your repository in a central place, this is quite easy with distributed version control like Git:
You can just put your central repository in some shared folder on a central machine and everybody can clone it from there.

If you want a "real" website on your local server, I know of the Git hosting website http://repo.or.cz.
It seems to have less features than GitHub, but unlike GitHub, you can get the source code and host it on your own local server.

Disclaimer: I only read about repo.or.cz, I never tried it myself!