Super Mediocre Guitar
Don't just be mediocre, be super mediocre
Chord libraryhttps://www.guitar-chord-finder.com/
Convert songs into chordpro formathttps://ultimate.ftes.de/
Chord Library http://adamsguitars.com/content/guitarwebapp/index.php?md=2
Music theory informationhttps://www.musictheory.net/