This hierarchical to do list organizer has been discussed here before. I'm trialing the version 1.2 beta, which includes a new task chooser that selects based on hierarchical multiplicative priorities. (This processalso been discussed before here, with regard to 'Life Balance' and 'My Life Organized.') I'm impressed with the forethought and, well, planning in this Planner. Plus, it seems to be the only hierarchical that has an outliner with the two features that for me determine whether it can be described as a 'modern outliner': a mark and gather equivalent ("pick up rows") and multiple undo in the tree.

There's also a promising forum.

Stephen R. Diamond