Phaser is a free and fast 2D game framework for making HTML5 games
Easy to use Python library for creating 2D arcade games
CGL (C Game Library) is a multipurpose library
This software is a particle effect editing tool
Orx: Data-Driven Game Engine
An Android library that provides views using openGL canvas
Portable suite of libraries and tools for building client applications
Plugin pack for making 2D games with Bevy
Open-source, cross-platform, game-development tools
Extensible HTML5 app for real-time collaborative projects
486 lines of C++: old-school FPS in a weekend
MMORPG
A Phaser CE plugin that brings sloped tile collision handling
scriptable game engine with built-in support for 2D graphics and sound
A Flash Molehill (Stage3D) GPU accelerated 2D game engine
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
C-Lesh is a game programming language for 2D games.
Access to Irrlicht Engine SDK from assembler, C, Python, Basic, Pascal