Includes some interesting lessons on how to play different styles of music. A bunch of lessons online, plus great other features, like interviews, a chord generator, photo gallery, hot news, and more. Guitar4u A wonderful series of lessons, brought to you by Gunharth Randolf, that cover both guitar theory and actual guitar playing. Features an online harmony quiz to test your knowledge. A large number of lessons available to those interested.
Some lessons are less than thorough in their scope, but they're helpful nonetheless.
Guitar Main Nice site created by Larry Pinkerton, with a series of intermediate to advanced lessons focusing primarily on jazz guitar. Visitors are encouraged to submit their own work. Harmony Central Lesson Archive Collection of lessons spanning many different topics. Many of the lessons have been submitted by users, so some of the information is less than top quality. Well organized, and well-documented lessons aimed at the beginner guitarist.