Good resources for hobby and professional guitarists on the Web:
http://www.all-guitar-chords.com/ - more than 2000 guitar chords, divided into two groups: normal and split chords. Also presents standard and exotic guitar scales for lefthanded guitar.
https://chordbook.com/guitar-chords/ - Interactive guitar chords resource. You can easily find and hear chords on a realistic virtual guitar, use a capo or save your chords.
http://chordfind.com/ - A good resource for finding guitar chords with an easy to read graphical interface. All guitar chords available as MIDI-files.
http://www.looknohands.com/chordhouse/guitar/index_db.html - Finger settings for more then 1,000 guitar chords. You can also print out your own selection of chords.
https://www.guitartricks.com/index.php - A collection of guitar tutorials both for beginner and advanced guitar players.
http://www.ezfolk.com/guitar/Tutorials/tutorials.html - Free guitar tutorials, tabs for acoustic folk guitar.
http://guitar.about.com/ - Beginner and advanced guitar lessons, tablature and lyric resources, forum, and links to guitar resources.
http://www.guitarnoise.com/lessons.php - free guitar lessons, interviews, tablature, career advice, songwriting pointers and much more.
http://www.guitarists.net/forum/index.php - a wide variety of guitar and guitar related discussions covering equipment, recording, tablature...
http://www.acousticguitarforum.com/forums/index.php - The Acoustic Guitar Forum - A forum for acoustic guitar enthusiasts.
https://www.guitartricks.com/forum/ - A good guitar forum on playing techniques, music theory gear reviews and more.