cchound.com - A curated library of free music for content creators
Vinyls - Vinyls is a music player that lets you listen to your music without any complicated setup.
Fugue - Free and premium stock music for your videos, games, and UI
Plexamp - A small music player with a number of unique features
Thematic - Free Music for YouTube Videos & Creators • No Copyright
SoundCloud Charts - The most played tracks on SoundCloud this week