SDL

Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer.

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Pygame

Pygame is a set of Python modules designed for writing games. Pygame adds functionality on top of the excellent SDL library.

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Orx

Orx is an open source, portable, lightweight, plugin-based, data-driven and extremely easy to use 2D-oriented game engine. Orx is mostly written in C, but allows you to develop with it with any language that can interface to C.

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SFML

SFML (Simple and Fast Multimedia Library) is a portable and easy-to-use API for multimedia programming.

Free Open Source Mac OS X Windows Linux

Allegro

Allegro 4 and Allegro 5 are cross-platform, libraries mainly aimed at video game and multimedia programming.

Free Open Source Mac OS X Windows Linux iPhone

GLFW

GLFW is an Open Source, multi-platform library for OpenGL, OpenGL ES and Vulkan development on the desktop. It provides a simple API for creating windows, contexts and surfaces, receiving input and events.

Free Open Source Mac OS X Windows Linux BSD

pyglet

Cross-platform windowing and multimedia library for Python.

Free Open Source Mac OS X Windows Linux

HGE

HGE is an easy to use yet powerful hardware accelerated 2D game engine. It is a full featured middleware for all who want to develop commercial quality 2D games rapidly...

Free Windows

Arianne

Arianne is a multiplayer online games framework and engine to develop turn based and real time games. It provides a simple way of creating games on a portable and robust...

Free Open Source Mac OS X Windows Linux BSD