BestWavs
Television, movie, music, and insult audio clips.
http://www.bestwavs.com/

MultiLoops
Multitrack drum loop CD-ROM libraries.
http://www.multiloops.com/

WavPlanet
Sounds from movies and television. Plus theme songs and midi sound.
http://www.wavplanet.com/

Matt's Music Page
Sounds from different movies, tv shows, and songs.
http://www.mattsmusicpage.com/own.htm

Makko's Sound Exchange
An audio collection of movie, music, comedy, and wrestling in WAV and MP3 files.
http://members.tripod.com/makko719/

PowerFX
Samples, loops and sound effects in an online library and CD shop. Production music, media tracks, button sounds, includes WAV, acid, REX, AIFF, ESX24, and Halion formats.
http://www.powerfx.com/

Holographic Sound Page
Binaural sound clips and a brief explanation of techniques.
http://www.noogenesis.com/binaural/binaural.html

A1 Sound Effects CDs
General collection of sounds on CD-ROM as AIFF, MP3 or WAV format. Also playable CD, Christmas, halloween, dog barking, thunder or thunderstorm, music.
http://www.a1freesoundeffects.com/cd.htm

Sounds of the cul-de-sac
Sound clips in WAV and MP3 format inspired by surburban noise.
http://www.richardsfault.com

Loopkit
Copyright and royalty free sound loops, purchase CDs and free downloads.
http://www.loopkit.com

Jeffsounds
Sound samples for custom tv and radio spots, funny or straight answering machines messages, telephony, narration or anything vocal. Also offers audio on CD for purchase.
http://www.jeffsounds.com/