Icons8 Fugue has a free option for non-commercial use (of some of their tracks), they just require credit: https://icons8.com/music. Source: almost 2 years ago

Music: Tribute Musician: Marco Lazovic Site: https://icons8.com/music/. Source: over 2 years ago

Free for non-commercial use provided you credit them in the description: https://icons8.com/music (note: some of these can't be used on YouTube due to Content ID). Source: almost 3 years ago

BTW I used Royalty free music Music: Looking At You Musician: Gabriel URL: https://icons8.com/music. Source: about 3 years ago

Https://icons8.com/music/ free stock music. - Source: dev.to / about 3 years ago

Epidemicsound.com, artlist.io, audiio.com all have some decent/good quality music but they are all subscription based. It's ROYALTY free, but the license to USE isn't free. Be careful if you go with any subscription, with some of them, the license is only good if your subscription lapses but with others, the license is lifetime regardless of your subscription status. Source: over 1 year ago

Just in case you were thinking about buying it audiio.com sfx lifetime licence is pretty bad. After being blasted with ads for a one-off lifetime payment for sound effects I bit the bullet and purchased. Turns out it's pretty terrible. They have virtually nothing beyond a few very short city and landscape sounds and a couple of whooshes and some random effects. Source: almost 3 years ago

Check out https://audiio.com - it's fairly newish but they're updating weekly and they have a lifetime membership for a reasonable cost, the music is decent, and the licenses cover virtually anything you need it for. Source: about 3 years ago