Modders,
Since we're working on a lot of code, and sharing it, we need a simple way to manage everything. The best way I've found is gitorious:
https://gitorious.org
It allows you to host git repositories, join teams, and use tags for version management and download links. Best of all, it's completely free (AGPL licensed)! I even made a group for us already:
https://gitorious.org/+minetest-modders
So please, consider joining us on gitorious!