IP-Toolbox.com - IP-Toolbox.com is the best site for quick and easy viewing of your public IP address and other related information.
IP Guide - Look up IP addresses, networks, and ASNs
What is my IP? - Find out what your IP is. Do not hesitate to open wimip.
ShowIP - ShowIP displays the IP address(es) of the current page in the status bar.
TrueIP - TrueIP is a small program that runs in the system tray, monitoring your IP address(es).
whatismyip.cc - External IP Address lookup tool with option to scan the external IP address.