gitnub

Command line version suits me well. If I need xcode integration, I can use xcode 4 preview, which has merging tools and code comparison boiled in. By the way the site talks about a discount until Dec 1, I guess I'd skip that discount no matter what, as others mentioned a tool called Git Tower which seems to have a pleaser UI. Some sites also suggested another open sourced Git UI called Gity http://gngrwzrd.com/ other than GitX which to me is just another blend of git-gui. In the OSS part Gitnub (https://github.com/Caged/gitnub) is a UI for Github and Git in general, but this one is not pure Cocoa (requires RubyCocoa.

Not sure what features you are looking for, but Textmate has a Git Bundle that gives you access to a pretty good range of git functions. (It's what I use for all of my non-cmd-line or github git interactions) http://blog.macromates.com/2008/git-bundle/ GitNub OSX: http://github.com/Caged/gitnub/wiki There is also GitK

See also GitNub: http://github.com/Caged/gitnub/wikis

If you're using Git on a Mac, try GitNub: http://github.com/Caged/gitnub/tree