Cocos simplifies game creation and distribution with Cocos Creator
Open-source Android/Desktop remake of Civ V
Voxel game-creation platform with easy modding and game creation
Multi-platform 2D and 3D game engine
Godot Kotlin JVM Module
Free, cross-platform 2D game engine powered by Haxe and OpenFL
The AWS GameKit Plugin for Unreal
Sdk library for creating 2048 game in c#.
MAME Android Emulator.
A multiplatform Dart movie app with 40% of code sharing
Hungry Hero is an open source Flash game built on Starling Framework.