Orx: Portable Game Engine
Phaser is a free and fast 2D game framework for making HTML5 games
Desktop/Android/HTML5/iOS Java game development framework
Innovative user interfaces made easy
Tool to build cross-platform and high-performance awesome apps
A simple and easy-to-use library to enjoy videogames programming
stb single-file public domain libraries for C/C++
3D Engine c++
Kotlin Multiplatform bindings to Skia
2D GPU-accelerated framework for ActionScript developers
A re-implementation of Freelancer
Dedicated Game Server Hosting and Scaling for Multiplayer Games
Real-time physically based rendering engine for Android, iOS, and more
Framework to facilitate communication in the Unity game engine
Template-driven engine to generate documentation
Godot game template and component-based framework
3D game engine/framework in C, with Luajit and Python bindings now
A showcase app for the Flutter SDK
An MVVM & Databinding framework that can use C# and Lua
UI Automation Framework for Games and Apps
The .NET MVVM framework for cross-platform solutions
Easy to use Python library for creating 2D arcade games
Creative cellular automata browser game
Ct.js is a desktop game engine that makes learning programming fun
The HTML5 Creation Engine