All royalty free (no need to pay for a license to use them in your music commercially).
As of today, this archive has 36,328 files uploaded!
There are samples of voices, drums, percussion, organ, guitar, bass, sax, world music, and more!
Perhaps you’ve already heard of Converse Rubber Tracks, this amazing library! Converse, in collaboration with http://www.Indabamusic.com have provided this incredible resource.
Sample types include full tracks (stems), loop files, and single hit “one-shots.”
Personally, I just downloaded Seth Haley’s samples of analogue synths (Juno, and a Modular). Thanks Seth, these are very cool!
Here is a link to the library, you should check it out:
You can easily collect and organize your favorite samples into a custom “Kit” (See the video, to see how).