what3words - Geocoding system for the simple communication of locations with a resolution of 3 m
ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
OpenStreetMap - OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
ipapi - Web analytics with IP address lookup and location API
Pataa - Pataa simplifies your long complex address into a unique short code that is easy to share & navigate. Mark landmarks & guide address with your recorded voice.
ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database