Just shipped rendezvous-kit; an open-source library for finding fair meeting points.

The problem: every "meet in the middle" tool uses geographic midpoint. That's just a straight line on a map. It ignores roads, terrain, coastlines, everything that actually determines how long it takes to get somewhere.

rendezvous-kit uses real routing engines to compute isochrones (reachability zones), intersects them, discovers actual venues inside the overlap via OpenStreetMap, and ranks them by fairness.

  Three fairness modes:
   > min_max: nobody travels too long
   > min_total: group minimises total travel
   > min_variance: equalise journey times

Routing is engine-agnostic; plug in Valhalla, ORS, GraphHopper, or OSRM. Self-host your routing infrastructure with zero API keys.

Venue search queries OpenStreetMap's Overpass API. You can point it at your own Overpass instance if you want full control; or use the public endpoint for free.

Only runtime dependency is geohash-kit (also ours). Zero third-party dependencies. TypeScript, ESM-only, MIT licensed.

Interactive demo with real UK scenarios; cycling in the Lake District, coastal concavity on the Severn Estuary, 5-person tight budgets in Manchester: https://thecryptodonkey.github.io/rendezvous-kit

Source: https://github.com/TheCryptoDonkey/rendezvous-kit