* AmiPS/2, a mouse adapter for Atari and Amiga.
* [[Willy]], an adapter to use Serdaco's OPL3LPT and S2P soundcards
* [https://pulkomandy.github.io/shinra.github.io/gemini.html [Gemini]], a RAM expansion of 1 or 2MB which can handle the ASIC page on Plus machines correctly. Runs also perfect with the CPC6128.
And some other abandoned or stalling project.