* Dobbertin EPROM Box
* Dobbertin Real Time Clock
* Dobbertin ROM blower
* [[Dobbertin]] HD20 Hard Disk
* Fischertechnik robot
* [[Vortex Computersysteme#M1|Vortex M1/Z]]
* [[Vortex Computersysteme#SP|Vortex SP 64 - SP 512]] RAM expansion
* Vortex Winchester Drive
* X-ROM ROM expansion and ROM burner