Mac users interested in Wireless traffic sniffer generally download:
Eavesdrop is a free TCP packet sniffer for the Mac. The app allows you to capture traffic on your home network. It is not a very advanced application at this time, and it has some limitations, but it still is a nice app to illustrate how a sniffer works, and it can even be used to analyze some traffic, if you happen to know what you are looking for.
Additional suggestions for Wireless traffic sniffer by our robot: