* [[Nova]] (NV-RAM and RTC).
* [[MultiPlay]] (additional mice and joysticks ports).
* [[Willy]] (up to 18 channels FM synthetizer sound card).
* [[PlayCity]] (6 voices PSG sound card).
* [[Amdrum]] (8-bit mono sound card).
* [[Amstrad_SSA-1_Speech_Synthesizer|SSA-1]] (english speaking speech synthesizer).
* [[Dk%27tronics_Speech_Synthesizer|DK'Tronics Speech]] (english speaking speech synthesizer).
* [[TMPI speech synthesizer|Techni-Musique Speech]] (multilingual speaking speech synthesizer).
* [[Mirage Imager]] (hardware freeze and snapshot handling).
* [[Willy]] (up to 18 channels FM synthetizer sound card).
* [[PlayCity]] (6 voices PSG sound card).
* [[Amdrum]] (8-bit mono sound card).
* Cycle counter (developer helper).