After one of my articles (http://news.ycombinator.com/item?id=2965626) got on HN, I built this little website with a friend. It's very simple and only tracks the commit count with the help of Git hooks.
When you say it only tracks the commit count, is it just a simple counter (e.g. "256 total commits across all branches") or does it break it down at all (by repo, branch, day, week, month, etc)?
The first section of the website could be more clear in this regard...
No repo/branch data is tracked. But the time when the commit happened is saved. So it's possible to break it down to year/week/day/hour. You can set your timezone in the settings to get correct times.
Currently a commits per day graph is available.
And I agree with your suggestion for the homepage, it should be clearer and have graphics or example graphs. Thanks!
hg has an extension for that http://mercurial.selenic.com/wiki/ChurnExtension
results are easy to parse to generate some other view