johnlak gimp plugins
very good CAD software
High-efficiency minimalist C++ wrapper for OpenGL 4.3
CIRT - CUDA Interactive Ray Tracer
Create and edit LDraw™ parts quick and easy.
Installs 180 Photoshop and GIMP Brushes, Plugins + Scripts fast
Open-Source Shoemaking
C++ Frontend for the RenderMan Interface
crossplatform multithreaded object-oriented render and audio engine
A powerful, free and open-source tool for TextureAtlases/Spritesheets
Qt Visual Graph Editor
Source mirror of LLGL GitHub repository
Realtime raytracer using SIMD on ARM, MIPS, PPC and x86
Java3d scenegraph editor
Stereo Photo Manipulation
Easy-to-use command line tool for images
Image viewer used for sorting and other utilities
Fileaxy does file sync, de-duplication, image matching & bulk preview
Python code able to convert / compress image to PI (3.14, π) Indexes