• layers with assigned effects
• many tools (magic wand, transformation, brush, rectangle, ellipse, polygon, ...)
• pattern and gradient fills
• all the basic filters (blur, drop shadow, bevel, color corrections, ...)
• gamma-aware blending, sub-pixel accuracy
• create your own filters and effects using javascript
• compatibility with Photoshop plug-ins
• collaborative web help - http://wiki.rw-designer.com/RealWorld_Paint.COM_Help_Index

The semitransparent rounded rectangle with control handles.
Note the reflection (stripes), shadow, and the blurred rectangle background.

The text layer uses a bevel effect and an azure shadow effect. There is a radial blue->red gradient with center near left lower corner.