Not the best port scanner around but it works well and quite fast. It is useful for security audit of your personal computer.
Faltron Port Scanner scans for TCP listening/open ports on your or remote system. You can scan a range of ports or just a single port. You SHOULD NOT scan other's system without their permission! I will not held responsible if you use it for illegal purposes.
The speed will be a bit slower when scanning remote system. You can double click on an open port to view more information on the DShield website.