Old school chating!
There're many instant messaging softwares: AIM, Ichat, MSN messenger. Most of them send clear text packet, easy to sniff.
KisMAC goes 0.04c
KisMAC is a stumbler application for MacOS X, that puts your card into the monitor mode.
John the Ripper binaries for OSX
John the ripper is the fastest unix (and other) password cracker.
KisMAC a new wifi scanner for OSX
It will puts your card into the monitor mode. Unlike most other applications for OS X it will remain completely invisible and send no probe requests.
Hackbot: another great banner scanner
Hackbot was design to scan cgi, check for open relay, rip checkup and More!
Malloc() Webminer a cgi, and hiden files/folder scanner
Malloc() Webminer will crawl a webserver for commun or default files or folders.