Phaser is a free and fast 2D game framework for making HTML5 games
Unity / XNA game patcher and plugin framework
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
BizHawk is a multi-system emulator written in C#
3D game engine/framework in C, with Luajit and Python bindings now
A lightweight online game framework
MAME is a multi-purpose emulation framework
Simple and powerful Unity3d game workflow!
A fast and reliable entity component system (ECS) and much more
egui: an easy-to-use immediate mode GUI in Rust
Framework to facilitate communication in the Unity game engine
Native Android app for Habitica
Extremely fast enterprise server framework, can be used in RPC
An MVVM & Databinding framework that can use C# and Lua
A framework to build Pokémon RPG games
A beautiful, easy-to-use and ad-free comic and game client
Multiplayer Framework for Node.js
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
An asynchronous event driven PHP socket framework
Powerful, fast and developer-friendly extension framework
Telegram Bot API for NodeJS