I use Adobe Photoshop, I think many others also use it.
It's nice for animations and and editing of photos
but first time I used it I was angry cuz I didn't know how to use it
I don't know if you already found the link, but I use
http://www.good-tutorials.com/
It's much more easier to use the Adobe Photoshop now
It can be used from beginners ++
Hope you like it