What is my IP? - Find out what your IP is. Do not hesitate to open wimip.
HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.
Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...
TrueIP - TrueIP is a small program that runs in the system tray, monitoring your IP address(es).
Forcepoint Web Security Suite - Internet Security