And... that's the only site I know . Feel free to add more links here.SoundBible.com offers free sound clips for download in either wav or mp3 format. We offer free and royalty free sound effects and clips for video editors, movie scores, game designers, and weekend sound warriors. Bookmark our page now by hitting Ctrl+D. We update weekly so be sure to return for one of the best copyright free sound resources on the net. Downloads are totally free and upfront with large download buttons to prevent confusion.
EDIT: lol found more after a google...
55 Great Websites To Download Free Sound Effects:
http://www.hongkiat.com/blog/55-great-w ... d-effects/
Royalty Free Music Sites: