ipinfo.io - Simple IP address information.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database
SmokePing - Smokeping is a tool for measuring latency.
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
PingInfoView - PingInfoView is a small utility that allows you to easily ping multiple host names and IP addresses, and watch the result in one table.