I was just trying another web GTD-idea-powered tool Toodledo and I must say that I’m shocked by it’s rich functionality (it is free). It has all the common GTD stuff - places, contexts, folder/project with some neat addon such as time tracking, calendar etc. This is for the moment best free GTD tool I’ve seen, [...]

I’m looking at Todoist - another neat Web 2.0 application. Clean simple design, quite intuitive interface and ability to define task lists (projects) and subtasks (levels) makes this application very cool. If you are looking for good todo solution - this one is definitely worth checking.