There's a long (58 item) list of "Software for Creativity & Idea Generation" at http://www.ozemail.com.au/~caveman/Creative/Software/swindex.htm

It sez:
"Click on the product name in the table of contents for a short description of the product.
"Clicking on the Product Name heading will give full details and screen shots."

Thanks, Gil. This is a great, if slightly overwheliming resource.