Giggle is a graphical frontend for the git content tracker (think of gitk on GTK+).
Install Giggle in ubuntu
For Ubuntu 10.04/9.10 users
Open the terminal and run the commands
sudo add-apt-repository ppa:deejay1/ppa
sudo apt-get update
sudo apt-get install giggle
Screenshot
How is this different/better from gitg? Can this handle commiting/stashing/branching, etc?