NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
HyperTrack - Build logistics apps that feel like the future
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
LocationAPI - Instantly locate any device w/ WiFi, celltowers & IP address