Below are mods that are not for DOS or SNES.
Many DOS and SNES mods are available.
First One (2016), a Game Boy Color mod by Norbert
Jaffar24's Levels (2018), an Apple II mod by Jaffar24
PoP Hack (2019), a Mega Drive mod by "Let's play Gamer"
PoP: Special Edition (1990), an Apple II mod by The Doppleganger