NmapFE for Mac

From Matthew Rothenberg:

NmapFE for OSX is a native Cocoa frontend for the Nmap port-scanning security tool.

Written in Obj-C, this frontend is designed to provide a more convenient way to use Nmap without sacrificing speed. Access to all major features is there, as well as a decent tooltip implementation to remind you about some of the more obscure features. The newest version adds the ability to detect the actual name and version of the software running on a port.