- OrmanKZ
- Oro uostų ekspresas:KeleivisLT
- Orsac Omvts
- Average Speed
- Ortung Infrastruktur
- Oruss
- OS Locate
- OS Maps: Walking & Bike Trails
- OS-Pilgerweg-App
- OS2Maps
- Osaka Rail Map Lite
- SEA.AI
- OSEL Buses
- Oskemenbus
- Oslo Airport (OSL) + Radar
- Oslo City Bike
- Oslo Map and Walks
- Oslo Offline Map and Travel Trip Guide
- OSM sketch
- OsmAnd Maps Travel & Navigate
- Osons le vélo à Six Fours !
- Ospedale ARNAS Brotzu Cagliari
- Ospedale Cona - Ferrara
- Osprey: EV Charging
- Osthessen-Blitzer
- Osuno Smart
- Oswego Canal
- Oszkar telekocsi
- Other Side Camera
- OTiS Mobile
- OTOConnect Maroc Telecom
- Otokimin
- OTT
- Ottawa Bus Live
- Ottawa Map and Walks
- Ottawa Ride Match
- Ottawa Transit
- Ottawa Transit (Live Times)
- Ottawa Travel Guide
- OuestGo
- Oulu Campus Navigator
- Our Schhol Bus - حافلتنا
- Oulu Campus Navigator
- Our Schhol Bus - حافلتنا
- Outdoor Bergamo
- Outdoor Explorer Utah - Map
- Outdoor Navigation ape@map
- Outdoor Run++
- Outdoor Schwyz
- Outdoor Tracker
- Outdoor Trentino
- Outdooractive
- OutDoors GB - Offline OS Maps
- OutDoors GPS France - IGN Maps
- OutDoors GPS – Offline OS Maps
- OUTMAP: hike, ski, outdoor
- Outside Maps
- OutWestWoods
- Outyng Client App
- OV flex
- OVAG E-Mobil
- Overal