* [[Ambug|Ambug Robot]] (DIY) (connects to printer & joystick port)
* [[Digiblaster]] (Playback) (DIY) (8bit DAC on printer port)
* [[Fischertechnik Interface]]
* [[FuturePlayer]] (modern MP3 playback, max 128kbps) (Dr.Zed)
* [[Simple RS232 for Printer usage]] (DIY) (one-directional, transmit only)