miniPaint - Online graphics editing tool use HTML5 technologies like Canvas, Offline support, Drag and Drop.
Online Image Editor - Online editor for images and animated gifs with multiple effects and tools
RealWorld Paint - RealWorld Paint is an free portable image/photo/animation editor.
Pixelitor - Pixelitor is a cross-platform raster graphics editor written in Java.
Paint XP for Windows 7 - Standalone old MS Paint program that allows you to get your old XP Paint interface in Windows 7.
RealWorld Photos - RealWorld Photos is an free portable photo editor for Windows.