GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.
ShowIP - ShowIP displays the IP address(es) of the current page in the status bar.
whatismyip.cc - External IP Address lookup tool with option to scan the external IP address.
Skeebus - Skeebus is a macOS menu bar app that displays your current public IP address
Geo IP Tool - Find a geolocation of an IP address including latitude, longitude, city, region and country.
What is My IP Live - Find your IPv4 and IPv6 just by visiting whatismyip.live - complete IP geolocation is also provided along with some other useful IP tools.