Beatmatch.info has released four new free audio loop packs:

• Mnml data vol.4
• Dubstep vol.3
• Future Hip-Hop vol.2
• new Beatmatch.info project BEAT+.

Beatmatch is also offering video introductions to the libraries, like this example for Mnml Data Vol 4:

MNML Data – Drum loop / Samples from beatmatch info on Vimeo.

Note: Beatmatch licenses its loop collection for non-commercial use.