I only know of a few site that have tutorials on them.
http://www.photoshopsupport.com/
http://www.ltytutorials.com/
<---- All for photo shop
http://www.createblog.com/ <----- Has quite a few tutorials for PS, PSP, Paint and Photo Impression.
It also has some tips for CSS and HTML!
http://www.random-is.me <---- not really has any tutorials, but has some free stuff!