Freesound!

Freesound.org

This is one of the greatest online resources you can find. It is a community where users can freely upload and download audio clips and even music.

Whether you’re a musician, video editor, or game designer you will definitely be able to get something out of this website. I’ve been using it for years, and I can’t even explain to you how helpful it has been. Here’s a video I did sound effects for, and all the audio is straight off of freesound: