zasmZ80 / 8080 / Z180 assembler (for unix-style OS)
a80Intel 8080/Zilog Z80 assembler written in D.
8080A complete emulation of the Intel 8080 processor written in C99.
z80Single header Z80 emulator for C++ (C++11 or later)
awesome-listAwesome Lists of retrocomputing resources (6502, Apple 2, Atari, ...)