Uppbeat - Free music for creators, no copyright issues
Swipefy for Spotify - Swipe left to boring music, swipe right on Swipefy!
Ties - Build a content pipeline with your creator dream team
BentenSound - Free stock music for your videos. Unsplash for music.
Developer's Guide to Content Creation - The book for devs who want to make quality technical content
Audio Hero - Over 250,000 royalty free music & sound effects for videos