Super Mediocre Guitar
Don't just be mediocre, be super mediocre
Chord Library
http://adamsguitars.com/content/guitarwebapp/index.php?md=2
Chord progression generatorhttps://autochords.com/
Guitar tab library and morehttps://www.ultimate-guitar.com
Chord libraryhttps://www.guitar-chord-finder.com/