SampleSwap.org

SampleSwap.org: "Download 4.6 GB of free audio samples (drum loops, vocals, synths, instruments, sound fx...) Free professional quality audio samples. Zero advertising.

This AIFF/WAV collection is currently 4.6 GB (9,823 sounds) including 1,860 techno, hiphop, trance, and drum 'n' bass loops / breakbeats, 2700 drum hits, 2040 sound FX, 570 instrument samples, 810 vocal samples, 748 melodic loops, and more."

Looks like a great resource for mixers and remixers.