I've just launched (today!) a new free webapp, zenlists (http://zenlists.com) that might chime with some of you, it allows you to quickly and easily maintain lists of anything.

I personally use it myself to implement GTD (which, when boiled down to its essence, is simply lists, lists, lists) but it is flexible enough to support several organisational methodologies.

Anyway, it's a bit rough around the edges at the moment and several more features are planned. I just wanted to get it 'out there' for now to see if anyone else takes to its sparse but functional design.

I've tried several other online to-do list type managers, but they have never 'felt' right to me, I think I'm too ingrained to using apps with a left-hand side menu as used by e-mail apps, newsreaders, etc. and needed a similar approach with my items/tasks.

Anyway, I'd appreciate any feedback, though don't be too harsh as this really is a very, very early release :-)