A game engine with an emphasis on real-time cutting-edge solutions
Descent 3 by Outrage Entertainment
JavaScript-based game engine designed to empower developers
s&box is a modern game engine, built on Valve's Source 2
IsoCity: City building simulation game
High performance UI layout library in C
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
An extensible development framework for roleplay games.