http://www.audioblocks.com/
Want to bring your desktop documentary to life? Add sound effects, backgrounds, music and digital effects just like in a deal documentary on the History Channel. I have tried to stick to as much royalty free material material as possible. Occasionally, though you may not be able to find what your looking for royalty free and may want purchase something, for this reason I have added a number of stock media sites. See Mr. Eisnor if you need something from one of these as we have a small budget for this sort of thing.