zx70's Stars
mamedev/mame
MAME
simh/simh
The Computer History Simulation Project
z88dk/z88dk
The development kit for over a hundred z80 family machines - c compiler, assembler, linker, libraries.
viti95/FastDoom
Doom port for DOS, optimized to be as fast as possible!
open-simh/simh
The Open SIMH simulators package
agn453/UNZIP-CPM-Z80
UNZIP and ZIP for CP/M Z80
atsidaev/quorum-cpm
CP/M system sources for the "Quorum", one of Russian clones of ZX Spectrum
psychotimmy/sharpmz-80k
Sharp MZ-80K programs