Sumopaint is a full featured painting and image editing application.

Features:

Layers with undo support

 - 11 blending modes
 - Duplicate, merge and flatten layers
 - Rotate and flip
 - Zoom and pan

Layers with classic layer effects

 - Drop Shadow
 - Inner Shadow
 - Outer Glow
 - Inner Glow
 - Bevel
 - Color Overlay
 - Stroke
 - Gradient Bevel
 - Gradient Glow

20 filters and effects in the following categories

 - Blur
 - Distort
 - Noise
 - Pixelate
 - Sharpen	
 - Posterize
 - Threshold

Professional painting tools

 - Over 300 brushes
 - Advanced options like gravity and auto orient
 - Real time bezier-curve smoothing
 - Animated brushes
 - Smudge, blur, sharpen, dodge, burn and saturation tools

Selection tools with full undo support

 - Lasso
 - Rectangular lasso
 - Magic wand
 - Rectangular and elliptical selections
 - Border, feather, expand and contract selection

Image enhancement tools including

 - Unsharp mask
 - Levels
 - Brightness / contrast
 - Hue / saturation
 - Color balance
 - Color temperature

Gradient tool

 - 15 gradient types including linear, radial and angle modes
 - 170 preset color selections
 - Gradients are anti-aliased

Clone stamp tool

 - Over 300 brushes
 - Diameter, opacity and flow
 - Advanced options like scattering and random rotation"