Sample Focus - The easiest way to find the perfect audio sample
Freesound - The Freesound Project is a collaborative database of Creative Commons licensed sounds.
Whyp - Free & fast audio sharing site
Tapes.AI - The future of sample packs
Sononym - Finally, a sample browser that understands audio
Vocaroo - Vocaroo is a quick and easy way to share voice messages over the interwebs.