LocationAPI - Instantly locate any device w/ WiFi, celltowers & IP address
HyperTrack - Build logistics apps that feel like the future
Companion - Never walk home alone
ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
Iris - The fastest web framework for Go in (THIS) earth
Mapbox Unity SDK - Real world location for Unity