For the past few years, I've been successfully running Gitolite[1] on a server with 1GB RAM. I recently checked out Gitlab as I thought it would be useful to have a nice web interface that allows users to easily see what projects are hosted and their corresponding URLs. I had to back away when I learned of Gitlab’s resource requirements.

Based on the sibling comments here, it looks like Gogs/Gitea should do what I want.

[1]: http://gitolite.com/gitolite/index.html