Phaser is a free and fast 2D game framework for making HTML5 games
Telegram Bot API for Java
2D GPU-accelerated framework for ActionScript developers
VR Adrix Java Works - Paged Lists - Action-Entity Model ...
SDL library for Android, including several games.
the java game and entertainment runtime
Arianne is an engine to develop multiplayer online games like Stendhal
LÖVE is an awesome 2D game framework for Lua
A Rust framework for building Minecraft servers
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 continuation of the popular Artemis ECS framework
a 2D Game Development Framework
Build Cross-platform Applications
MMORPG
A Phaser CE plugin that brings sloped tile collision handling
Cocos2d for iOS and OS X, built using Objective-C
The Perfect core toolset and framework for Swift Developers
A Flash Molehill (Stage3D) GPU accelerated 2D game engine