Pixelmator uses the touch screen extremely well (pictures)
Once a Mac-only image editor, the new Pixelmator for iPad might be the best in its class for touch screens.
Pixelmator for iPad
One of the favorite image editors on the Mac is now available for iPad and it's loaded with photo tools, effects, and templates designed for almost any photo project.
Add effects
Choose your effect from one of several categories, then adjust by dragging the anchors onscreen.
Tons of tools
Each of the drawing tools has several options with many different styles.
Color correction
Use the presets or slider for a quick color correction or adjust brightness, contrast, and saturation individually.
Pick your format
You can use Pixelmator's proprietary format, common image formats, or export to continue working in Photoshop.
Selection tools
Just like Photoshop, you'll get several selection tools for precise masks and adjustments.