There isn't just one, there are thousands.
This catalog shows applications and services that use OpenStreetMap data. The main goal is to show users who want to switch to OpenStreetMap a nice overview and ways to participate.
The metadata for the apps is collected from OpenStreetMap Wiki, Wikidata, GitHub and Taginfo project list.
This website is created and maintained by Markus Peloso. It is a hobby project. If you have questions about OSM Apps Catalog or would like to request a feature, feel free to ask. I'm interested in hearing from users about how they use this catalog, so please get in touch!
Go to the catalog. It is updated every day.
Help with the translation:
- from the OSM Apps Catalog on Weblate
- from the apps documented in OpenStreetMap Wiki or Wikidata.
AI docs here: 
Take a look at the usage statistics of the OSM Apps Catalog
- Dmytro Ovdiienko for his Osm Software Catalog. This was the inspiration for this OSM Apps Catalog, and I learned from it how to request pages from the Wiki that use a specific template.
- Tobias Knerr for his TTTBot. This catalog is based on many of his works.
- weblate and all translators of this catalog for supporting open source projects for free.
- all who made this catalog possible.
OpenStreetMap and OSM is a trademark of the OpenStreetMap Foundation, and is used with their permission. This project are not endorsed by or affiliated with the OpenStreetMap Foundation.
- Become part of the OSM community (Learn your etiquette): Join a local group, meet & chat
- Contribute to OpenStreetMap
- About me