A game engine with an emphasis on real-time cutting-edge solutions
Descent 3 by Outrage Entertainment
s&box is a modern game engine, built on Valve's Source 2
JavaScript-based game engine designed to empower developers
IsoCity: City building simulation game
High performance UI layout library in C
SDL based generic 2D game engine
A real-time 3D Engine written in Ada
An ASI plugin for Grand Theft Auto V
State Management and Multiplayer Networking for Turn-Based Games
Amazon Lumberyard is a free AAA game engine
Web powered cross-platform 3D, WebXR game engine
DarkForest, the Facebook Go engine
An advanced flexible game engine for Java.
Cross platform administration tool for Source Engine dedicated servers