I download and installed Maple Professional today. It is an excellent outline manager, good for keeping notes, information, programming tasks, etc., etc.
A nice side effect - you can convert a file to a windows helpfile (chm). That makes helpfile generation extremely simple.
The price of the program is usually $30.95 but it is free for today (Mar 17, 2011) from Giveaway of the Day - Maple Professional:
Check features here: