There are 2 repositories under z80asm topic.
The development kit for over a hundred z80 family machines - c compiler, assembler, linker, libraries.
A simple text-based adventure game
Support for Z80 macro-assemblers in Visual Studio Code
Стартовый набор для вхождения в разработку под ZX Spectrum // A set of software, source codes, literature, utilities, and a build system for entering development for ZX Spectrum
👾 My Z80 assembly source code, binaries, and dev tools for the Bally Astrocade game console.
The first Z80 emulation library for Arduino
half float library for C and for z80
My MSX basic and assembly programs
A fast Forth 2012 Standard system written in Z80 assembly for SHARP PC-G850 pocket computers. Plus new fast Z80 IEEE754 math libraries.
Z80 libraries for the Sega Master System
Skeleton C (sdcc) project for MSX binaries
Instant ZX-SPECTRUM - best emulators, software collection, ZXBOX VM build
a BASIC interpreter for CP/M and the RetroBrew SBC v2, based on the Z80 port of Palo Alto Tiny Basic
An audio driver for the NeoGeo written in Z80 assembly
Upgraded S3&K sound driver
An hello world for Game Boy made with GBZ80 asm
Zalt is a home brew Z80 computer with a modern(isch) chipset.
Reverse engineering games using SkoolKit
Network neXt Time Protocol. Server in .NET Core, Clients for ZX Spectrum Next™ and .NET Core.
Assembly MSX Z80 Code for ROM Games by ThePetsMode using ASMSX assembler
Robot Poncots (ロボポン) Sun and Star (Japanese)
Various plugins for CSpect, an emulator for the ZX Spectrum and ZX Spectrum Next™
Forth code, Microprocessor Z80, CP/M-Version adapted at Institute for Applied Physics, University of Bonn
FantASM - A Z80 assembler
A C library for using the TMS9918A video board on a RC2014 retrocomputer.
A repository with open source ZX Spectrum programs, mostly in Z80 assembly