The Game Boy was a line of handheld gaming devices created and sold by Nintendo. Typically development of the Game Boy done today includes homebrew games, emulator building, and preserving code and coding techniques.
Rednex Game Boy Development System - An assembly toolchain for the Nintendo Game Boy and Game Boy Color
A gameboy emulator that only plays Pokemon Blue, in ~50 lines of c++.
Multi-system emulator (NES, SNES, GB, GBA, PCE, SMS/GG, WS) for Windows, Linux and macOS
Game Boy / Gameboy Color emulator and debugger for macOS, Windows, Linux, BSD and RetroArch.
Game Boy / Color engine with lots of features
ROM Properties Page shell extension
A tilemap editor for Game Boy, Color, Advance, DS, and SNES projects. Written in C++ with FLTK.
A simple GameBoy emulator written in C++
An original Game Boy outfitted with Game Boy Color support and other modern features
Game Boy / Game Boy Color music tracker
Gameboy Emulator Library
Converts to and from tile based graphics from retro video game hardware
A song and sound editor for pokecrystal-based sound engines.