I wrote earlier a bit about Scrum and how it looks similar to GTD. The practical reason for looking at Scrum was that I’m working on a small project which uses Scrum principles (not the full blown version). As it seems, most of the tools available to support scrumming are a bit too heavy for my needs, so I took the opportunity to write my own small app - and learn Ruby on Rails in the process :)
The result is now on SourceForge: A small RoR app called BagLock. Not perfect, but maybe somebody finds it useful.