I know this is something that gets asked for quite often - I haven't tried this but apparently it's very good:
http://www.imitationpickles.org/ludum/2007/12/13/sfxr-sound-effects-for-all/
Thanks for the link, I can't wait to play with this and see if it's as useful as it sounds.
Crikey, how'd I miss that
(slaps forehead)
What an excellent post. Still, no second prize. ;o)
Just to make this thread somewhat useful, here's another SFX generator someone might prefer:
http://www.badsectoracula.com/projects/soundfx/
Here are a few more that I know of.
Stomper Hyperion
http://www.lysator.liu.se/~zap/stomper/index2.htmland my current favorite, Drumsynth. The page I had for it doesn't work right now, but a quick Google search came up with lots of places to get it.