ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
Sunn - A smart light fixture that brings the changing sun indoors
ipapi - Web analytics with IP address lookup and location API
Radar - Radar - Location sharing for friends and teams.
ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database
Indoor Location - SDK for indoor location as a service with Estimote Beacons