Gimp

[iJack]

www.gimp.org

Gimp is like photoshop, but free.

Try it, you have nothing to loose.

http://www.gimp.org/features/barrel-distortion.jpg
http://www.gimp.org/features/perspective.jpg

[Blahages]

Paint.NET (http://www.getpaint.net/) is also a good alternative (Though only for Windows), as well as Google Picasa (http://picasa.google.com/features/index.html) for some things.

Gimp is very good, But I've never liked its layout.

[iJack]

Gimp is very good, But I've never liked its layout.

i know what you mean, but look what i made on it: