The Freesound Project
Just listening to the cacophony of sounds I hear walking down the street to the grocery store, I know sound wants to be free. So where do all those free sounds go at the end of the day? They make their way to The Freesound Project, which is a growing database of audio clips, sound effects, beeps, boops, and other audible tidbits released under the Creative Commons Sampling Plus License. Like all things free, your mileage may vary when looking for sounds in this collection. Not all sounds are released at identical quality levels and not all sample submissions are of the same caliber. Still, the data base has an outstanding preview feature allowing for listening to individual files or layers of files playing simultaneously. If you've been seeking a place where you can find great noises to include in your own creations, this is a great place to start. And if you have the rights to any sounds you'd like to make available to others, this is a good way to share the wealth.