image-processingProcessing - Flexible software sketchbook and a language for learning how to code within the context of the visual arts.
c-plus-plusBansheeEngine - Modern C++14 game engine with Vulkan support, fully featured editor and C# scripting
game-enginepanda3d - Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU
glslOlive - Non-linear video editor aiming to provide a fully-featured alternative to high-end professional video editing software