6thsense is a TCP port scanning technique which allows you to remain completely invisible to the scanned host, as described in a Bugtraq post by Antirez. This perl script automates the tedious process.
You can download it from the following link: https://packetstormsecurity.com/files/download/24827/6thSense.tgz
Source: https://packetstormsecurity.com/files/24827/6thSense.tgz.html

