ccMixter is a community music site where you can find tons of music that falls under the Creative Commons license. The site lets you listen to music, sample music, create mashups and more. Just keep in mind that some creative commons licenses may require that you give credit to the source within your video.
FreeSoundtrackMusic.com provides exactly what it advertises – royalty-free tracks for use in films, YouTube videos, games or other multimedia productions. Some of the music on the site does cost money. However, a lot of it is labeled as “FREE” and can be easily downloaded and added to your video production.
Partners In Rhyme has got all sorts of great stuff, from free music loops to sound effects, midi files and more. Some of the royalty free music on Partners In Rhyme costs money, but they’ve got a selection of free music loops and full-length tracks for free download as well.
Incompetech In the site’s FAQ you’ll see that the music on the site is free to use for your video soundtrack. The site owner just asks that you place a credit within the video.
Beatpick offers a great selection of licensed music and if you are using it in a non-commercial or non-profit production it’s free. Once you’ve chosen a song that you want to use, click on “License Song” and choose “Non Commercial projects.”
Moby Gratis If you want to use music by a well-known artist without paying licensing fees then check out Moby Gratis. Moby provides some of his music for free download and use. The music is free to use, provided your film is non-commercial or non-profit.
Musopen! Online library of public domain music
Partners in Rhyme: Free Sound Effects