If you like ginger beer, and pineapple, home fermented ginger beer and tepache de piña are both really easy to make - they do have sugar but less than coke, and have probiotics, and about as much alcohol as kombucha.
I do like diet Coke but mostly try to be very moderate and when I want something sweet & fizzy, these homemade sodas are so good.
Yes, even better looking now and oh so photogenic.