SwiftShader is a high-performance CPU-based implementation
ImageMagick 7
Fast and simple digital painting software
Image management application
Library to encode and decode images in WebP format
Powerful and easy-to-use embedded GUI library with many widgets
A fast image processing library with low memory needs
A free, high-quality, and portable font engine
Hewlett-Packard's Linux imaging and printing software
A collection of packages providing extra functionality for GNU Octave
Display, convert, and edit raster image and vector image files
Img is a collection of format handlers for the Tk photo image type.
Drawing, graphics conversion, software development, administration.
Lynkeos is an astronomical webcam image processing software for OS X.
Cross Platform GUI Toolkit
Resilient Image Library - successor to DevIL
Doing 3D with Tcl
A simple 3D framework in C++