Super Mediocre Guitar
Don't just be mediocre, be super mediocre
Lots of good tools and visualizationshttp://fretflip.com/
Search what you are looking forhttp://www.reddit.com/r/Guitar
Chord libraryhttps://chordbook.com/
Library of songs in Chordpro formathttp://getsome.org/guitar/olga/chordpro/