A parallel, proxying, port scanner. PPScan was written in 2009 while I was working on my OSCP. There were many lab machines, and a few that would only have certain ports open on interfaces shared through dual homed http proxy servers. Since I wanted "quick" results, I wrote a small scanner which could quickly saturate my own link with requests and track them all. Hence, the parallel proxying scanner was born.
Currently, it's in the 0.4 version, and supports TCP-Connect, TCP-Syn, HTTP-GET, HTTP-CONNECT, and FTP-bounce scanning. I'm working on trying to add an ssh based tunneling mechanism as well.