Hi! I've been using KiCAD/FreeRouting.net for several ECB and S-100 homebrew computer boards. They are all free/open source so if anyone would like them please let me know. I've found the existing boards make great templates for your own homebrew computer projects.
The ECB boards are made of all commonly available parts on 160x100mm Eurocards so they aren't a big deal. The S-100 boards do have some custom part library/footprints, etc due to the 0.125" pitch card edge connector and IEEE-696 board outline. There are about 10 ECB boards and 6 S-100 boards available. It's never been very clear to me how to contribute back parts to the KiCAD project so I'll just leave this posting here in case anyone now or in the future is interested. Thanks and have a nice day! Andrew Lynch
