The windows area

Sam Spade this is the best thing for Windows users to make their machine as much like Unix as possible, if you dont know what I mean by all this Unix stuff click here

GateScan 3

I like this wingate scanner, probably one of the best.

Legion

The tool that stands alone as the only Win32 file share scanner just got better. Legion 2.1 is here.The previous versions of Legion were functional tools, but we saw many improvements that could be made. Legion 1.x was unstable on some machines, it was slow and it relied on a unusual method to actually probe the remote machine. Legion 2.1 addresses all of these issues and more. for more details click here

Super Scan

THE best port scanner for Windows users. If you have Linux and you don't have NMAP already, get it here

DDos Ping

DDoSPing is a remote scanner for the most common Distributed Denial of Service programs, it'll dectect Trinoo, Stacheldraht and Tribe Flood Network programs , however they must be on thier Default settings.