OpenGameArt.org

Audio Library is a YouTube channel dedicated to search, catalog, sort and publishes free music for content creators.

Free sound effects in wav and mp3 formats

Free Production Music by Jason Shaw AudionautiX.com

Free Music Archive is your number 1 resource for royalty free music and 'free to download' music.

Claim-free and completely free-to-use BGM and sound effects — safe for YouTube creators.

Free sheet music, royalty free music, and public domain resources