darktable is an open source photography workflow application
Swiss army knife of image processing
Python code able to convert / compress image to PI (3.14, π) Indexes
Scientific Visualisation Made Easy
Emgu CV is a cross platform .Net wrapper for OpenCV
Graphic Live Mixer
Machine learning, computer vision, statistics and computing for .NET
Advanced image processing toolbox for Scilab on Unix/Linux/Mac OS
Open source library for processing arrays and matrices
OpenCV library wrapper for Lua language