Recently, Ed Bott listed his 10 favourite Windows programs of all time on his blog here. I thought it was interesting, for I agree with a few of his favourites: Process Explorer, RoboForm, SnagIt, Windows Live Photo Gallery. His other program choices are worth considering, too.

I would add  Acronis True Image and  Diskeeper to my list of programs that I regularly use and recommend.
What are some of your favourite Windows programs?