A layer built on top of the Insight Toolkit (ITK)
The open-asset-importer-library repository
Vivid is a modern C++ 3D engine using OpenGL4+
Cross-platform 2D and 3D game engine
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Paint Program
3D game engine for C and C++
KPEdit - A 2D skeletal animation editor.
A generalization of Conway's Game of Life