OpenGL Mathematics (GLM)
ImageMagick 7
darktable is an open source photography workflow application
Library to encode and decode images in WebP format
A fast image processing library with low memory needs
ArrayFire, a general purpose GPU library
A powerful cross-platform raw photo processing program
A standalone, large scale, open project for 2D/3D image processing
Resize images and animated GIFs in Go
A modern, cross-platform, 2D Graphics library for .NET
A layer built on top of the Insight Toolkit (ITK)
Swiss army knife of image processing
A collection of packages providing extra functionality for GNU Octave
Scanning probe microscopy data visualisation and analysis
Photo/Video/GIF enlargement using machine learning
Lynkeos is an astronomical webcam image processing software for OS X.
Scan Tailor Experimental is an interactive post-processing tool
Scientific Visualisation Made Easy
Resilient Image Library - successor to DevIL
itom - an Open Source Measurement, Automation and Evaluation Software
Astrophotography image & video processor. Full processing cycle
Batch Image Rename, Slideshow, Convert, Resize in Windows Context Menu
Instantly crop & export images along the guides in Adobe Photoshop