HaxeFlixel is described as 'Create cross-platform games easier and free. All with one codebase' and is an app in the Development category. There are more than 10 alternatives to HaxeFlixel for a variety of platforms, including Windows, Linux, Mac, Android and iPhone. The best alternative is Unity, which is free. Other great apps like HaxeFlixel are LÖVE (Free, Open Source), WaveEngine (Free, Open Source), Pygame (Free, Open Source) and nCine (Free, Open Source).
Pygame is a set of Python modules designed for writing video games. Pygame adds functionality on top of the excellent SDL library. This allows you to create fully featured games and multimedia programs in the python language.
FreeBASIC is a completely free, open-source, 32-bit BASIC compiler, with syntax similar to MS-QuickBASIC, that adds new features such as pointers, unsigned data types, inline assembly, object orientation, and many others.
batari Basic (bB) is a BASIC-like language for creating Atari 2600 games. It creates a binary file that can be run on an Atari 2600 emulator or the binary file may be used to make a cartridge that will operate on a real Atari 2600.