Ear Training Software
http://www.byear.com/?a=ag3128

Blank Sheet Music
http://www.blanksheetmusic.net/

Scale Method
http://www.guitarscalesmethod.com/?a=ag3128

Renegade Minds (guitar trainer)
http://renegademinds.com

Sight reading help:
http://www.garywillis.com/pages/lessons/read.html

Tablature:
www.guitar-pro.com
www.power-tab.net
www.musedit.com