Over the last several years, I’ve played around and used several Source Control systems. Among the Perforce, GIT, Subversion and a few others. I have to say I’m very happy with GIT thus far. Despite the complaints of some, GIT is an excellent system and has saved me from source code hell a few times.
You can find more about git here:
http://git-scm.com/

The tutorials are quite good and can get you up and running quickly.

Once you’ve created the repository, go ahead and created an annotated tag with, for example the name v0.1.
After this, running the “git describe” command will provide you with incremental versioning, which is very much needed when you’re reporting bugs on a
particular commit. Just try giving your colleagues the SHA1 of the particular commits when they ask you the version in which the bug was found. I suspect they’ll be none too pleased, though you might get to figure out who knows what SHA1 is 😀

This automatic versioning is also useful when using a Continuous Integration server such as Hudson, Jenkins, etc.