SoundRangers.com
Sound effects and music downloadable in WAV and AIFF format. Custom sound design available.
http://www.soundrangers.com/

Sonomic
Online library of sound effects, samples, and loops. Includes a search function, preview of sounds, and instant download.
http://www.sonomic.com/

Jem Studio
Offering a sample music, sound effect, and beat CD.
http://www.samplecds.8k.com/

Sound of the Web
Library featuring flash loops, music loops and sound effects for digital developers.
http://www.soundoftheweb.com/

Sound Service
Sound effects, music loops downloadable in WAV, AIFF for Flash and multimedia. Membership is required.
http://www.soundservice.com/

Digitraxx
Trance, drum and bass sound loops. Monthly contests and prizes.
http://www.digitraxx.com/

Loop Library
Preview and download loops and samples for your own music productions. Online store available.
http://www.looplibrary.com/

Sounds Online
Wide variety of loops, samples, and sound effects, also sample CDs, software and demos. Ordering and free downloads.
http://www.soundsonline.com/

The Producer's Toolbox
A collection of sound design elements, effects, and musical loops. Ideal for television, Flash and radio, sound designers and editors.
http://www.producerstoolbox.com/

Realistic Piano
A collection of soundbanks for Soundblaster Live, EMU APS, Terratec EWS64L/XL and compatible soundcards and software.
http://www.realisticpiano.com/

A1 Free Sound Effects
Audio downloads in WAV format. Different categories include, animal, people, radio, weather, cartoon. Also provides unique sounds on CD.
http://www.a1freesoundeffects.com

EFX
Post production sound effects library for audio-visual and multimedia applications such as cinema, television, radio, video games, CD-ROMs and sound effects for use at theme parks.
http://www.efx-sound.com/

DigiFish Music
Supplies unique and original, copyright cleared music for multimedia, film, games, television, video, and web projects.
http://www.digifishmusic.com/

Soundcrafting.com
Pure Heat for samplers and MPC 2000, MPC 3000, MPC 4000, and Roland MV8000. Pure Heat, nothing but hard hittin' Kick drums and Snares, Hi hats, Hitz, Efx, riffs, chords, gtr, and horns.
http://www.soundcrafting.com/

DIVA Classical Female Soloists
Gigastudio sample libraries featuring DIVA classical female soloists.
http://beladmedia.com

Abstract Beats
Hip hop and urban sounds for Akai MPC's and software samplers. Catalog, ordering information, and downloads.
http://www.abstractbeats.com/

Discovery Sound
Supplies sample CDs, CD-ROMs, and downloadable sounds featuring sound effects and ethnic, rare, and traditional music.
http://www.discoverysound.com

ReasonBanks
Producing sampling libraries in Refill format for Reason software. Products catalog, support and download area.
http://www.reasonbanks.com/

ModernBeats.com
Develops Hip Hop libraries for all most popular software samplers. Catalog, audio samples, purchasing information.
http://www.modernbeats.com/

MI7 Libraries
Searchable library of music samples and sound effects for producers, song writers, remixers, disc jockeys.
http://www.mi7libraries.com/

SoundsForSamplers
Custom sound library`s for the akai mpc2000, mpc3000, mpc4000 ensoniq asr10, asrx, asrxpro, and korg triton.
http://www.akaimpc.com/

AudioPervert
A collection of analog, digital and live drum, percussion, and effect samples in WAV and Akai CD-ROM format.
http://www.audiopervert.com/