For photoshop CS 5.1 extended edition
http://www.gfxvoid.com/ (http://www.gfxvoid.com/)
http://www.youtube.com/watch?v=qlhrrNycTl4
http://www.youtube.com/watch?v=XTOJfV-PsBM
http://www.youtube.com/watch?v=veJY-knQFyw
Some beast tuts. ^^
www.sigtutorials.com (http://www.sigtutorials.com)