<a href="http://copyrightfriendly.wikispaces.com/" target="_blank">Musopen</a>

<a href="http://copyrightfriendly.wikispaces.com/" target="_blank">Copyright-Friendly and Copyleft Images and Sound (Mostly!)for Use in Media Projects and Web Pages, Blogs, Wikis, etc.</a>

<a href="http://www.soungle.com/" target="_blank">Soungle</a>
This one lets you search for free sounds by key words.

<a href="http://www.openmusicarchive.org/index.php" target="_blank">Open Music Archives </a>

<a href="http://soundbible.com/" target="_blank">Sound Bible</a>

<a href="http://ibeat.org/" target="_blank">ibeat</a>

<a href="http://www.purple-planet.com/" target="_blank">Purple Planet</a>

<a href="http://freemusicarchive.org" target="_blank">Free Music Archive</a>

<a href="http://www.classiccat.net/index.htm" target="_blank">Classic Cat</a>

<a href="http://www.publicdomain4u.com/" target="_blank">Public Domain For U</a>

<a href="http://www.soundsnap.com/" target="_blank">Sound Snap</a>