darktable is an open source photography workflow application
Swiss army knife of image processing
A collection of packages providing extra functionality for GNU Octave
Scanning probe microscopy data visualisation and analysis
ProStack - a platform for image processing and analysis
Astronomical object/structure detection from 1D and 2D data sets.
Resilient Image Library - successor to DevIL
Image processing library in C/C++
Libraries and command line tools for medical image processing.
Graphic Live Mixer
A small C library for building user interfaces with C, XML and CSS.
Advanced image processing toolbox for Scilab on Unix/Linux/Mac OS
Software for data analysis, image processing, simulations, solver.
Heterogeneous Image Processing Acceleration (HIPACC) Framework