Every creative journey starts with Unity Hub
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Cocos simplifies game creation and distribution with Cocos Creator
Parabator 2 - Free 3d board game
Vivid is a modern C++ 3D engine using OpenGL4+
3D C++ Game Engine - yet another open source game engine
A 2D game engine and level editor
IGS Labs
Legandary Story of the Zarakite
Karel - 3D language interpreter
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Open Game Bootstrap
Mahasona engine is an open source game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Kinect based controller.
A microscopic pedestrian crowd simulation system and library
SuperWikia: The Runtime/Realtime Environment for Codesmiths
Final Fantasy like 3D Game