Skwonk is an application that will listen to your Ethernet interface for traffic. All traffic. Like a traffic monitor. Difference is, Skwonk plays specific sounds for the type of packets that go flying by. For example, if a TCP packet for port 80 goes flying by the network to another Mac, Skwonk can blurt out a belch, or hoot like an owl, etc.
What's new in Swonk! X
Version 1.2 fixes an issue where Skwonk! simply would not Skwonk at all.