Shader Toy - Build and Share your best shaders with the world and get inspired.
Spectrum - Client-side image transcoding library.
Tiny Renderer or how OpenGL works: software rendering in 500 lines of code - Brief computer graphics / rendering course.
Looperepool - Tool to create looperinos.
KABOOM! in 180 lines of bare C++ - Brief computer graphics / rendering course.
imutils - Series of convenience functions to make basic image processing operations such as translation, rotation, resizing, skeletonization, and displaying Matplotlib images easier with OpenCV and Python.