People use the C64 for their own programming projects, be they modest (or not). This page is not to list every little program.
So what makes these special? - It is that the creator posted about their project in a relevant C64U forum and we show love for their work by listing it here.
A clone of Wordle for the C64 (FB post creator
A 'Commodore business sim'.This is a fantasy sim rather than a strict “what if” business model.