ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
ipinfo.io - Simple IP address information.
Zabbix - Track, record, alert and visualize performance and availability of IT resources