Phaser is a free and fast 2D game framework for making HTML5 games
Pterodactyl® is a free, open-source game server management panel
A lightweight game server framework implemented with Actor Model
Godot game template and component-based framework
A lightweight online game framework
3D game engine/framework in C, with Luajit and Python bindings now
egui: an easy-to-use immediate mode GUI in Rust
LÖVE is an awesome 2D game framework for Lua
A framework to build Pokémon RPG games
Native Android app for Habitica
Framework to facilitate communication in the Unity game engine
Phaser CE is a fun, free and fast 2D game framework
UI Automation Framework for Games and Apps
Drogon: A C++14/17/20 based HTTP web application framework
A web-based IDE for HTML5 game development. Powered by Phaser
Powerful, fast and developer-friendly extension framework
An asynchronous event driven PHP socket framework
Better Stack JavaScript client
Arianne is an engine to develop multiplayer online games like Stendhal
the java game and entertainment runtime
JavaScript framework to build game engines, games, emulators and apps
Lightweight, facility, high performance golang based game server