I made a little explosion sound effect generator, the idea being to help out people looking for such things for making video games, and so on.  It  relies on portaudio, libsndfile, and gtk2.

I don't really know what I'm doing when it comes to DSP, so probably some of you will laugh when you see my algorithms.  But it does more or less make explosion sounds.

It's here:

http://smcameron.github.com/explodomatica

Enjoy

-- steve