Modizer is described as 'multiformat modules & chiptunes player which allows you to listen to computers and consoles music (C64, Amstrad CPC, Atari ST, Amiga, PC, ...)' and is an app in the Audio & Music category. There are three alternatives to Modizer for a variety of platforms, including Windows, Linux, Mac, Raspberry Pi and Raspbian. The best alternative is Audio Overload, which is free. Other great apps like Modizer are ZXtune (Free, Open Source) and Chipamp (Free).
Chipamp is a free bundle of existing plugins for Winamp that lets you play a variety of chiptune and tracker formats, including music from classic game consoles like the NES, SNES, Sega Genesis, Gameboy, and Playstation.