ipinfo.io - Simple IP address information.
What is my IP? - Find out what your IP is. Do not hesitate to open wimip.
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.
ifconfig.co - What is my IP address? — The best tool to find your own IP address, and information about it.
TrueIP - TrueIP is a small program that runs in the system tray, monitoring your IP address(es).