GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.
My Public IP - My Public IP is a utility to let you know through which internet IP the world see you.
What is my IP? - Find out what your IP is. Do not hesitate to open wimip.
IP-Toolbox.com - IP-Toolbox.com is the best site for quick and easy viewing of your public IP address and other related information.
whatismyip.cc - External IP Address lookup tool with option to scan the external IP address.
G-NetWiFi - G-NetWiFi is a powerful mobile app that serves as a top-notch drive test and network monitor solution for all devices using Android OS.