Godot is a powerful cross-platform game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Xash3D FWGS engine
Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc
Multi-platform 2D and 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Solar2D Game Engine main repository (ex Corona SDK)
An unofficial rules engine for the world's greatest card game
Open source voxel game engine with support for survival and crafting
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
JUCE is an open-source cross-platform C++ application framework
Satisfying monster shooter
A modern cross-platform low-level graphics library
Innovative user interfaces made easy
Embeddable JSON Database engine C library
SwiftShader is a high-performance CPU-based implementation
Tool to build cross-platform and high-performance awesome apps
The game engine for everyone
Open source text shaping engine
Light and Fast AI Assistant