Build games and applications for almost every platform imaginable -- Windows, Mac, Linux, iOS, Android, BlackBerry, Firefox OS, Tizen, Flash and even HTML5.



Heaps.io is described as 'Heaps is a cross platform graphics engine designed for high performance games. It's designed to leverage modern GPUs that are commonly available on desktop, mobile and consoles' and is a game development tool in the development category. There are more than 10 alternatives to Heaps.io for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Heaps.io alternative is Unity, which is free. Other great apps like Heaps.io are LÖVE, HARFANG 3D, Pyxel and Pygame.
Build games and applications for almost every platform imaginable -- Windows, Mac, Linux, iOS, Android, BlackBerry, Firefox OS, Tizen, Flash and even HTML5.



Flixel is and open source game-making library in ActionScript3. Designed for use with free tools Flixel is easy to learn, extend and customize.


Amulet is a free Lua-based audio/visual toolkit suitable for small games and experimentation. It runs on Windows, Mac, Linux, HTML5 and iOS.
Verus Engine is a modern, platform-agnostic 3D game engine. It is developed using C++ and HLSL. It is based on Direct3D 12 and Vulkan graphics APIs. The code is user friendly and well optimized.



GeeXLab is a cross-platform demotool for 3D programming, demos creation, game development, interactive applications, creative coding and prototyping.
FlashPunk is a free ActionScript 3 library designed for developing 2D Flash games. It provides you with a fast, clean framework to prototype and develop your games in. This means that most of the dirty work is already done, letting you concentrate on the design and testing of...
Monkey is a modular language. You can create your own custom modules and use other people's - including the awesome box2d and minib3d modules!.