SUMO Paint is a free professional software that lets you create and edit images right in your browser while offering powerful tools and layers support.

The application is totally free to use, it loads really fast and can be used from any operating system or browser that supports Flash. The application also supports external embedding, meaning you can access SUMO Paint for editing images from your own website by passing the image url as a GET parameter.

Features:

• Layers with blending modes
• Layer Effects
• Shape Tools, Brush, Ink, Clone Stamp, Eraser, Gradient, Custom Shape, Symmetry, Transform, Magic Wand, Lasso, Smudge, Line, Blur, Curve, Zoom Tool
• Color Picker
• Swatches
• Saving images with multiple layers
• Selection Modify

Website: http://www.sumopaint.com/web/

Demo: http://www.sumopaint.com/app/