Sega Master System
Entornos de desarrollo - librerías
devkitSMS
https://github.com/sverx/devkitSMS
A collection of tools and code (with a very presumptuous name) for SEGA Master System / SEGA Game Gear / SEGA SG-1000 homebrew development using 'C' language (and the SDCC compiler).
Examples: http://steveproxna.blogspot.com/search/label/devkitSMS
PSGLib
https://github.com/sverx/PSGlib
Z80 ASM library (and C conversion/compression tools) to allow replay of VGMs as background music/SFX in SEGA 8 bit homebrew programs
Emuladores
Gearsystem
https://github.com/drhelius/Gearsystem
Gearsystem is a cross-platform Sega Master System / Game Gear / SG-1000 emulator written in C++ that runs on Windows, macOS, Linux, iOS, Raspberry Pi and RetroArch.