C64
New Commodore 64 Desktop OS?
Feb 23, 2019  Retro Recipes
https://youtube.com/watch?v=gDPRWKzuEtI
"Today we're exploring the new miniGangCart (wait miniWhatNow?!) from the Polish team GangC64, including the recent-ish updated Final Cartridge III Desktop, with its intriguing C64 GUI which includes applets and disk operations! The cartridge includes a LOT more though such as a machine code monitor/disassembler and... perhaps too much more."