OTB is an open-source C++ library for remote sensing images processing
Extract prominent colors from an image. JS port of Android's Palette
fill a selection according to neighboring gradient area
OpenGL Image Processing LIBrary
Image processing framework to integrate EM software packages.
Bildster is an image processing library for educational purposes.
Image processing suite for Electron Microscopy
matlab 2D image processing GUI toolbox for flow visualization
Legacy C++ libraries for basic image processing
GridMos, mosaicing tool (in MATLAB) to improve cell counting.
Add watermark to any image or photo (batch processing available).
View and alter images (batch processing available).
An image processing and analysis library for Matlab
A Multi-functional GUI-based Program for Image Processing and Analysis
A free image processing and managing libary for windows forms.
TurboSphere is an easy to learn and powerful JS based game engine.