OsmAnd (OpenStreetMap Automated Navigation Directions) is an open source map and navigation app Android and iOS.

Sygic GPS Navigation is an offline GPS navigation app with real-time traffic for Android with free 3D offline maps from TomTom.

NAVIGON is a GPS navigation software.

MAPS.ME (MapsWithMe) is a mobile app for Android, iOS and BlackBerry that provides offline maps using OpenStreetMap data.

Apple Maps is a web mapping service.