Is there something specific you would like me to link? I'm really not exaggerating when I say the web is overflowing with this content. I could link some of the "big" names, but for every one there are dozens or hundreds of similar sites. It's never-ending, especially since almost every indie artist/dev promotes other indies.

https://bandcamp.com/

http://www.jamendo.com/

https://soundcloud.com/

http://freemusicarchive.org/

http://itch.io/

http://www.gog.com/

https://www.humblebundle.com/

http://www.indieroyale.com/

https://libregamewiki.org/Main_Page