From December of '06 by the folks at SimpleDollar.com:
This is a pretty good list. It has everything from word processor to money management to email clients to photo editing. Many of the listed 30 software apps are still going strong today.
At least this is a good starting point if you are interested in free software for Windows.
Please share with our readers your experience, if any, with any of these listed apps. Or, share with us some alternatives if possible.