[morisy]

I've become a surprised addict of HabitRPG, a "gamified" To-Do system that does a great job handling one off tasks, daily/weekly things, habits you want to nudge yourself to do more regularly, and everything else I needed from a solid GTD app but couldn't find.

It also has a great API, free mobile apps, is open source, easy to export data via CSV or JSON, and has an amazing community behind it. The only thing it really lacks for me, right now, is a way to track larger projects, but I've started keeping those together in a weekly review doc that is separate. Highly recommended.

http://www.habitrpg.com