An AI tourguide which presents the nearest geotagged Wikipedia pages to the user's location and then produces an entertaining summary of your chosen topic on request. It's just a simple mashup of Wikipedia, MaxBox and OpenAI APIs.
A "leaving the house" dashboard for my wife. It's displayed on a tablet near her mirror, and shows weather and live public transport information to reduce the "I missed the bus and I didn't realize it's raining" disasters that get her day off to a bad start.
I've had a lot of fun making these with Gleam. It has the "if it compiles, it usually works" factor that people love about Rust, with none of the complicated borrow-checking rules. It's very simple - once you're up and running, there's not a lot more to learn about the language and you can just focus on modelling your problem.