Thus far I only took advantage of the 100% discount for PromptPal, which is a pretty cool enhancement for the old Windows command prompt. Nicest thing is that it's a 2-pane sort of affair, and when you type in a command like "dir", it automatically pops up all of the command-line options.
It also dispenses with the ridiculous "different from everything else in Windows" method of mark-copy-paste that you need to do if you want to move any text to and from the command prompt.
I'll probably share the wealth, with a steep member-discount for Duck Tiles.
Oh, and this comic cracked me up.
Just thought I'd share the wealth.