Sketch Mirror - Preview your iOS designs directly on your devices
Spott - API to work with cities, countries and political divisions.
Crystal: Sketch Mirror for Android - Crystal: Sketch Mirror for Android is an application that is designed for viewing your sketch designs in real-time, navigate prototypes and download content related to the sketches for offline viewing.
BigDataCloud IP Geolocation API - Next Generation IP GeolocationAPI
Flowkit - Sketch library for user flows/content maps/annotations
IP Location - IPLocation.io provides a free lookup tool to check the location of your Public IP Address. It finds this data through various GEO IP databases and online services. Just enter an IP and check its location easily.