Godot is a powerful cross-platform game engine
Xash3D FWGS engine
Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Solar2D Game Engine main repository (ex Corona SDK)
Open source voxel game engine with support for survival and crafting
An unofficial rules engine for the world's greatest card game
Open source routing engine for OpenStreetMap
Cromite a Bromite fork with ad blocking and privacy enhancements
UCI chess engine
Real-time physically based rendering engine for Android, iOS, and more
Voxel game-creation platform with easy modding and game creation
Embed web technologies in applications
A modern cross-platform low-level graphics library
JUCE is an open-source cross-platform C++ application framework
Satisfying monster shooter
Innovative user interfaces made easy
Embeddable JSON Database engine C library
SwiftShader is a high-performance CPU-based implementation
The game engine for everyone
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Open source text shaping engine
Light and Fast AI Assistant