Phaser is a free and fast 2D game framework for making HTML5 games
Unity / XNA game patcher and plugin framework
Create Minecraft bots with a powerful and high level JavaScript API
Pterodactyl® is a free, open-source game server management panel
A lightweight game server framework implemented with Actor Model
BizHawk is a multi-system emulator written in C#
3D game engine/framework in C, with Luajit and Python bindings now
Godot game template and component-based framework
Simple and powerful Unity3d game workflow!
A fast and reliable entity component system (ECS) and much more
MAME is a multi-purpose emulation framework
egui: an easy-to-use immediate mode GUI in Rust
Framework to facilitate communication in the Unity game engine
Extremely fast enterprise server framework, can be used in RPC
Native Android app for Habitica
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
An MVVM & Databinding framework that can use C# and Lua
Drogon: A C++14/17/20 based HTTP web application framework
UI Automation Framework for Games and Apps
Powerful, fast and developer-friendly extension framework
Telegram Bot API for NodeJS
The repository for MonoTorrent, a bittorrent library for .NET