application to organize lists?

hey guys,

i've been looking for an application that helps you organize lists, and you can categorize them and stuff. i know that the sticky notes application exists, which is what i use right now, but i'd like to be able to double click on a category and continue adding to a list, but all in a neater format.

thanks so much!

application

go the whole hog and get a decent one, omnioutliner, standard version
The Omni Group - OmniOutliner