Do you use a sticky-notes, or yellow post-it notes type desktop program?
Well, even if you don't, this one might well convert you.
To quote directly from Tom Revell's website - "The design goal behind Stickies is that the program is small and simple. Stickies will not mess with your system files, or write to the registry. Stickies stores information in a single text-based ini file.

Stickies will never support animated dancing figures, or play "Greensleeves". They are instead yellow rectangular windows onto which you can put some text notes. Once created, they will stay on screen until you take them away. Just like a real sticky piece of paper."

Give this powerful, bug-free program a try. It is superb.