I built this site in my spare time because I wanted to get some statistics on when I am prone to procrastination. In building it I realized I could make it so others could use it as well. In the spirit of everything I do, it is open source and if you don't trust me with your data (I promise I am not looking at it other than for the graphs below) you can run it yourself. It is already primed to run on Heroku (procfile, settings, etc) but it is just a Django application so you should be able to run it anywhere you have python.
Below are some stats I find interesting. All times are Pacific Time.