PixBuilder - Free Photo Editing Software for PC
MyPaint - MyPaint is a fast, distraction-free, and easy painting tool for digital artists.
showFoto - ShowFoto is the standalone image editor of the digiKam project.
Microsoft Paint - Paint (formerly Paintbrush) is a simple, ultra-basic graphics painting program that is included...
Fotografix - In addition to being totally portable, Fotografix has a ridiculously small footprint.
GIMP - GIMP is a multiplatform photo manipulation tool.