Dennis Kuschel's MyCPU

This homebrew TTL CPU is pretty cool. Dennis Kuschel, the originator/inventor offers it as a kit. The computer kit can be configured from minimalist to expanded and runs several packages of software including an open source "window" based operating system called Contiki. If I wasn't having so much fun tinkering with my own ideas for a TTL CPU, I might consider building one of these.