Delightful small tools built on simple data
Local Wikipedia shows only articles within a half-hour walk of you, and the comments are the whole story: "Obvious in hindsight with every location having coordinates." One person found an abbey near them in Western Bavaria they never knew existed. Asks were small: choose distance, use metric. The Real Kevin Bacon and the Apple Music 404 page were other pure-fun entries, and the TrenchBroom story praised a Quake map editor built by a fan and still loved.
The pattern: the front page rewards small, finished, joyful things that use an existing dataset in a new way, from the person who made them for themselves. Even the author said it "took too long to make."
The nuance is that polish matters: The Real Kevin Bacon got stuck in a loop on iOS Safari and was criticized for thin content behind a "tap to continue."
So what?
A new angle on a dataset everyone already has, like coordinates, can win attention with almost no marketing. Ship it small, test on mobile Safari, and take the first round of feedback (units, distance controls) seriously.
Read these
Local Wikipedia: Wikipedia, but only for things a half hour walk from you
The Real Kevin Bacon
Apple Music 404 Not Found
The Quake Fan who built the map editor everybody uses