A few months ago I was playing around with jQuery quite a bit. I came out with a jQuery desktop-esq demo (which can probably be found here in a download link somewhere) and created a new repository for it at GitHub.
Unfortunately, things happen and both fell by the wayside. I have a few new projects that will be coming up in the near future and GitHub will be used extensively and a buddy told me about a very nice front end for Git called SmartGit. Playing around with it was a good excuse to finally get the repo updated.
If you are looking for a nice GUI for Git I highly recommend it. It is free for non-commercial use and reasonably priced otherwise. It is not open-sourced, but you still cannot beat the price.
If you are interested in checking out the little jQuery Desktop application you can find it here: