This was a fun weekend project created last year with friends & fellow Hyper Island alumni Johan Cato (frontend) and Sebastian Andreasson (backend).
The idea was to help people come up with Christmas gifts in the style of Secret Santa, where you don't know much more than how much you're willing to spend.
So the result: a Christmas gift generator that uses Pricerunner API to give you tips on random gifts based on price. If you like it, you can go and get it via Pricerunner.
http://julkl.app (no longer live).
Attached prototype and screenshots.