http://www.how-to-play-electric-guitar.net

This completely free site is aimed for absolute beginners to electric guitar playing. Here you can learn all the important first things: how to tune, get cool sound, read tabs, positioning the guitar, pick, and finally play cool alt-rock and metal riffs!

...free-metronome-software.html

Here you can easily download free metronome program for both PC and MAC

f-guitar.com

Rock, Pop Metal, Neoclassical licks and tricks for lead guitar players