I visited the vcfe.org event in Munich, Germany.
Below you will find some urls for the projects that I came across.
- Steckschwein 6502 computer: https://steckschwein.de/
- Siemens Simatic S5 PLC: https://en.wikipedia.org/wiki/Simatic_S5_PLC
- CP/M operating system: https://en.wikipedia.org/wiki/CP/M
- Old fashioned MUD game Nemesis: http://nemesis.de
- Eastern Germany Robotron hardware: https://en.wikipedia.org/wiki/VEB_Robotron
If you like these things, the next exhibition will be in September in Berlin (you can find more info on vcfb.de).
Regards, Jeroen Baten