|git-scm.com's GUI clients|
A fellow called Erik Blomqvist has put up gitx.org which offers a more balanced view on the various forks. While there might be some value in the simplicity of the old GitX, three years is a long time in Git's development, and GitX is missing out on some newer Git features (like submodules).
Anyhow, there are still a number of pages out there that says GitX is still the way to go. People are even still submitting stuff in the bug-tracker, which is awfully pointless, of course.
Just keep this in mind next time someone asks you about a good Git GUI for Mac.