Sound Effects, Midi's, Waves, and MP3's

StoneWashed.net
Free sound effects, loops, button sounds and samples for multimedia productions.

HollywoodEdge.com
free sound effects

CrazyNet
A collection of midi's.

FlashKit.com
Free soundfx for download! All effects are available in mp3 and flashtrak formats.

PartnersInRhyme.com
Royalty free music and royalty free sound effects. Download royalty free music for free to use in your multimedia projects.