Originally developed by Jasc, it's now part of the Corel stable of creative programs.
PaintShop Pro is a neat little art program. Although not as fully featured as some of the above it's still very competent software for many aspects of art and design. Whether it's photo editing, drawing, or creating/designing graphics, there are a lot of tools and additional plugins available to get the effect you want. Originally developed by Jasc, it's now part of the Corel stable of creative programs.