What is my IP? - Find out what your IP is. Do not hesitate to open wimip.

Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.

GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.

Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.

TrueIP - TrueIP is a small program that runs in the system tray, monitoring your IP address(es).

BreachLock - BreachLock is a versatile platform that provides scalable and smooth penetration testing services for vulnerabilities.