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