http://www.tabit.net/

A great program for any aspiring guitarist or composer. Easily create tabs and hear them played back to you. A great way to develop your composition skills, especially if you don't have looping/recording abilities. ALthough I recommend learning Music Classically (LEARN YOUR FSCKING MODES -- ITS HOW IT ALL STARTED! AND IF YOU CAN WHISTLE IT YOU CAN PLAY IT)