An open source sort-of CP/M 2.2 distribution.

System Software for Z80/Z180/Z280 Computers

R.T. Russell's BBC BASIC for Z80, with additional features by J.B. Langston

Z80/Z180/Z280 Macro Assembler for CP/M, UZI180 and RSX180

CP/M for the Commodore 128

UNZIP and ZIP for CP/M Z80

CP/M-80 analog operating system for 6502 CPU incl. Utilities

Custom CP/M 3 BIOS for Z80-MBC2 single board computer

Applications and utilities for the Z80 microprocessor and RC2014 computer

VEDIT ⧸ VEDIT‑PLUS for CP/M V2.33b (04/27/87) source code

com-cpm: COM, a CP/M-80 simulator (in portable C and 68000 assembly flavors) by Jim Cathey

Firmware source codes for the CRISS CP/M modern single-board 8-bit full-featured personal computer!

A CP/M-ready, Z280-based SBC for RC2014 bus

Screen-oriented Text Editor for CP/M and RSX180.

Software for Bill Shen's Z280RC Single Board Z280 system on a RC2014 board

CP/M system sources for the "Quorum", one of Russian clones of ZX Spectrum

CP/M Public Domain 8-inch Disk Images

Z80 CP/M Emulator based on "CP/M on breadboard by Grant Searle" and RC2014 Compatible

ZSM aka Z80ASMUK assembler and tools for CP/M.

Reconstituted source code for ZDE 1.6 (Z-System Display Editor)