OSM App Catalog
There isn’t just one, there are thousands.
This catalog shows apps and services that use OpenStreetMap data. It is updated every day. The apps are rated and sorted by the Community Contribution Score.
The metadata for the apps is collected from OpenStreetMap Wiki, Wikidata, GitHub and Taginfo project list and combined.
> Add OSM apps you know or contribute in other ways.
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from the OSM Apps Catalog on Weblate 
from the apps documented in OpenStreetMap Wiki
The app is licensed under the GNU Affero General Public License v3.0. The code is free for use, copying and modification if you publish under the same license.
The OSM Apps Catalog does not store personal user data.
For anonymized usage statistics, the project uses GoatCounter, a privacy-friendly analytics service. No personally identifiable information is collected. (Check collected usage data)
Some information provided by the user’s browser (such as language or platform) may be used locally to improve the user experience. This data is processed within the browser and is not stored or transmitted to external servers (except for anonymized analytics as described above).
The website is hosted on Github Pages. The GitHub documentation on GitHub Pages says:
Data collection
When a GitHub Pages site is visited, the visitor’s IP address is logged and stored for security purposes, regardless of whether the visitor has signed into GitHub or not. For more information about GitHub’s security practices, see GitHub Privacy Statement.
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.
