But my favorite one page system is Simple D6. Repetitive but elegant. I like that Aspects can even be used easily for stuff like stress/sanity rules or to represent vehicles. 1st image is basic rules, 2nd is clarifications, and the rest are notes for doing Low Fantasy and Cyber Punk with it. I also personally made a pocket mod (fold out pamphlet) that's linked below if you like that sort of thing.

https://mega.nz/#!EHxGjRpI!gNTZtlM6hPPYHBEZiz-p7mShixoxAYcBgmAcAby5n50 https://witches.town/media/zhixL2cm5E0jbggjt60 https://witches.town/media/OSqIdyMc0DOK2FZWlz8 https://witches.town/media/5OZuGxPd1BR6SO9RdcQ https://witches.town/media/TsjCY4mV-ytk3Z8FOGY