Cool, I always enjoy clever git visualisation tools. While you are immersed in code it's hard to get a good grasp on what are your routines, or on what you've accomplished, and these tools give you a nice picture of that - and I've found them rather useful on retrospective or post-mortem moments.
One of the tools I use now an then is gource:
https://code.google.com/p/gource
It puts you entire log on a neat graph like file structure with the contributors firing out changes to nodes as time goes by.