Update My Address Book
I built Update My Address Book (https://updatemyaddressbook.com) more than a decade ago to make it easier to collect addresses from family and friends so that we could send out Christmas cards. It's been the app that I've rewritten every few years when I want to test out a new tech stack. After getting laid off a few weeks ago, I decided to give it a complete rewrite with some new features (offline support, lists, passkeys) and a new UI. It's still very much a work in progress, but I'd really appreciate any feedback that could help make it useful for others as well.