Programs towards the top of this page are more likely to remain of some use.
A very simple MIDI pattern sequencer.
A real-time digital effects unit that works (with some delay) on live input.
HTML compressor that removes whitespace from HTML source code.
An experimental program intended to support cutting up and rearranging drum loop samples, which was never all that useful. :)
Falling blocks game for Windows 3.1+. (Probably still works in current versions, but I haven't tested.) Supports internet play.