Songstats: Music Analytics

Qobuz: Music & Editorial

TrueFire Guitar Lessons

Stationhead

Maestro Amadeus - Sheet music

Meludia Melody - Ear training

IMSLP

Songsterr Guitar Tabs & Chords

Soundmap - Find Your Songs

Soundtrack: Music for Business

MuzicSwipe: Discover New Music

Fender Play - Learn Guitar

Auto-Key | Music key detection

OPUS Connect

Moshidon for Mastodon

Spark: Chords, Backing Tracks