• Article about how to make a Z80 multitask system.
• Z80 multitasking robot system 3 microphones for direction control, wireless remote and more.
• Z80 Source Code for Interfacing 4Mb Drams, Development System About 15 years of Z80 code ramblings including Z80 Tiny Basic.
• Z80 Systems without alterable Memory explains how to make it more efficient than most Memory Systems.
• Z80 SRAM This page shows how it is possible to connect a SRAM and an EPROM in series (?) for a Z80 processor system.
• Z80 bootloader Boot the Z80 CPU from PC via LPT complete Docs and Software (Pascal).
• Z80 CPU Controller Project Z80 based control unit primarily designed for operating and monitoring various aspects of home life.
• Tasto telegrafico computerizzato con Z80 (Italian) CW Morse Keyer.
• Schematics, PCB-Layout, etc for a small Z80 system by Mario Prato.
• First Z80 System by Thomas Scherrer.
• Z80 NICD Computer Super smart NICD computer charger. by Thomas Scherrer and Kenny Andersen.
• Z80 homebrew project by Matthias Huber (German).
• Hackinjoe - Homebrew Z80 Computer.
• Homebrew Computer based on the (ex-GDR) Z1013 (German).
• The G.I.D.E., Generic IDE interface for Z80 machines, by Tilmann Reh.
• The P112 CPU Board, a Z80182 system by Dave Brooks.
• CPCng Prototype Design, a project to build an affordable CPC clone based on the new Zilog eZ80.
• T80 CPU, Configurable cpu core that supports Z80, 8080 and gameboy instruction sets.
• The Alice II Z80 based computer, by Brad Grantham and Lawrence Kesteloot.
• Steve's Electronic Stuff, Homebrew z80 system (info and schematics).
• Z80 ISA Card by Jim Delaney (zip archive, 7.3M), for more information please look here.
• Chipselect.de, sps programmable z80 single-board computer project by Jan Kordas (German).
• CEPAC-80 SMD, z80 single-board computer by Stefan Wimmer (German).
• Homebrew z80 system by Steve Maddison, including hardware details and all schematics, as well as a simple operating system for low-spec computers named FOCUS.
• ngsystems Matthias Hüsch, NGZ180pro homebrew z180 computer (German).
• FS22-647 computer by Gilbert Conus, in French (English version coming soon).
• Z80 USB Slot Car Driver Peripheral, by Jim Delaney ("allelectrix").
• Z80 System project by Ivan Z.
• nopLabs eZ80L92 Based 50Mhz CP/M Computer
• N8VEM Single Board Computer.
• Dom's Homebrew Z80.
• SEPIA & EURO Z80 Einplatinencomputer, by Heinrich Kolter (in German).
• Arthur-PC - a HD64180 based computer.
• Z.E.D Machine, by YT2095.
• Wishbone High Performance Z80 at opencores.org.
• Electric Hobby Projects at AppliancePartsPros.com.
• A tiny z80 based computer, by Vaxman.
• The Z80_mini, by Vaxman.
• z80 project by Marko Vanhanen (in Finnish).
• Z80 Single Board Computer, including TFT display with ILI9325 controller.
• Jazz Disassemblies
• Z80 EEPROM Programmer, how to build a Z80 system with EEPROM which can be programmed over a USB link from a PC (does not require a pre-programmed EEPROM).
• Homebrew Z80 Computer, by Marton Kun-Szabo.
• Homebrew Z80 CPU on FPGA implementing ZX Spectrum, by Goran Devic.
• EFEX Z80 Single Board Microcomputer

Helpful links:

• Electric Appliance Hobbies, Resources, and Projects
• Links at Electronics Lab.