I built <a href="http://gitego.com" rel="nofollow">http://gitego.com</a> a few months back to keep track of watchers, forks, size, and issues over time. I'm glad they're enhancing the code-related graphs. Stats for those would be much harder to gather externally.<p>Edit: Looks like Metior was tracking code stats externally from GitHub as well <a href="http://metior.herokuapp.com/" rel="nofollow">http://metior.herokuapp.com/</a>.