[jasonz]

Using gitx (http://gitx.frim.nl/) really helped me grasp some of the concepts you talk about.

[calloc]

That one has been mostly abandoned by the author, for one that is regularly updated take a look at https://github.com/laullon/gitx which is a fork of the original GitX.

[gcb]

http://stackoverflow.com/questions/1516720/git-gui-client-fo...