- Sistem eKonsular
- SISTEMA V 2.0
- SIT Client
- SIT GPS
- Site Guide Navigation & Pager
- Sitealcanza - Compra y vende
- Sitecomm GPS
- SitePlan
- SiteSense Systems
- Sitium
- Yutraffic Messenger
- YuBike
- SITREP Tactical Mapping (iTAK)
- SitReport
- Situate
- Siu Mobile BH
- Siu Mobile Teresina
- SivasMobil
- SixthBoro - Realtime PATH Data
- SIZgo
- SióBusz
- Sk8pots
- Skagen Offline Map and Travel Trip Guide
- Skansen Chorzów
- Skanzen
- Skarby Blisko Krakowa
- Skatespot
- Ski Haute-Gaspésie
- Ski Tracker – Snow Trail Map with Riding Report
- Ski Tracks
- Ski Tracks Lite
- Skif Pro
- SkifMe
- SkiMap3D-Yllas
- SkiMaps - Download Trail Maps
- SkiPal - Accurate Ski Tracks
- Boat Log Book, Ship's Logbook
- Skippers Log
- Skippertools - Logbook & More
- Ski Master - ski track tool