Creative Commons
- Creative Commons Org
- Definitions of Attribution, Share Alike, Non-Commercial, No Derivative Works
- Free Christian Music
- Public Domain - musopen.org
- Public Domain - pdmusic.org
- Public Domain - IMSLP/ Petrucci
- Public Domain - Choral Wiki
- Public Domain - mutopiaproject.org
- Public Domain - Choral Music at cipoo.net
- Creative Commons Search - Google
- Creative Commons Search - Jamedo.com
- Creative Commons Search - freemusic.freeculture.org
- Creative Commons - ccmixter.org
- Creative Commons - opensonics
- Project Gutenberg - Sheet Music
- Project Gutenberg - CDs and DVDs
- Creative Commons - unheardbeethoven.org
