Build The Music Free Online Guitar Resource Center
Build the Music is a free online guitar resource center. The site collects all the free information online about guitar. Basically there are 3 sections in this site, they are schematics, resources and tools section. In these sections you can find lessons, amplifier, tab, mod guides, do it yourself and many more. There is also a community forum about guitar and you can sign up and make contribution. Check it out as the site really have lots of free guitar related information. It should be able to keep you occupied for some time.