Ask HN: Jev - Anyone built anything useful for day to day work with Jev?

Tired of seeing all the same deterministic demos with Jev around coding. If anyone has built anything useful which runs Jev at its core like a proper game, chrome extension, mac app, I'd love to see.

Doesn't need to be a proper product, a mini-project works too as long as it is useful to others and not just to the maker.