ImageStone is a powerful C++ library for image manipulation. It is written in pure C++ and easy to portable. It includes load/save(BMP GIF JPG PNG TIF ICO TGA PCX PSD...), display, histogram, undo/redo and transform image with over 100 predefined effects
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.