A framework to build Pokémon RPG games
Unity / XNA game patcher and plugin framework
Phaser is a free and fast 2D game framework for making HTML5 games
Multiplayer Framework for Node.js
2D GPU-accelerated framework for ActionScript developers
VR Adrix Java Works - Paged Lists - Action-Entity Model ...
LÖVE is an awesome 2D game framework for Lua
Plugin pack for making 2D games with Bevy
A complete framework for Godot to create beautiful and complex AI
Open-source, cross-platform, game-development tools
a 2D Game Development Framework
MMORPG
A Phaser CE plugin that brings sloped tile collision handling
A Flash Molehill (Stage3D) GPU accelerated 2D game engine
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
Cross platform 2D game creation framework with Python bindings
StarlingPunk is a framework built on top the Starling library
Runtime graphic engine (use OpenGL) for ObjectPascal
A generic framework for the generation of game levels.