Webster and Flint
Tinderbox's ability to replicate a post-it board full of non-linear notes is brilliant and irreplaceable. Why does this matter? Look at the popularity of tagging as an organizational scheme for modern blogs. Tagging has become popular precisely because 'chronological' and 'hierarchical' just don't cut it as organizing principles for the giant spinning cork ball of the creative mind.
I quite like Webster's design, too