IP-Toolbox.com - IP-Toolbox.com is the best site for quick and easy viewing of your public IP address and other related information.
TEQNIX.io - Online Penetration testing tools and automations
GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.
SmartScanner - SmartScanner is an AI-powered web vulnerability scanner for testing security of web sites and applications
TrueIP - TrueIP is a small program that runs in the system tray, monitoring your IP address(es).
SecApps - Find security vulnerabilities right from your browser.