Knmap is a graphical front end to the nmap "Network exploration tool and security scanner" available from http://www.insecure.org/nmap.

The main Knmap window provides for the entry of nmap options and the display of nmap-generated output. Multiple concurrent nmap scans, each with a different 'profile', can be controlled by the one instance of Knmap. Profiles allow for frequently used parameters sets to be easily invoked.

Of course, full documentation is provided - including a version of the nmap man page in HTML form which is linked to the option windows via the "What's This?" facility.