hiking

Mapy.com

Czech Republic

Czech maps and navigation from Seznam.cz, a.s.: world coverage with proprietary CZ map data and OSM abroad, multi-mode routing, offline maps, and a developer REST API.

Organic Maps

Estonia

Estonian open-source offline maps and GPS navigation (Organic Maps OÜ): OpenStreetMap-based hiking, cycling, and driving guidance with no ads or tracking.

OsmAnd

Netherlands

Dutch open-source offline maps and multi-mode navigation app (OsmAnd B.V., Amstelveen) built on OpenStreetMap data for Android and iOS, with optional OsmAnd Cloud sync.

komoot

Germany

German outdoor route planner and navigation app (komoot GmbH): sport-specific hiking and cycling routes on OpenStreetMap data, offline maps, turn-by-turn voice nav, and Garmin/e-bike integrations.