simple TCP data capture program

[Dominiod]

Hi, 
 
Is there a simple tool in freebsd (in ports?) that allows you to see data going to 
and from a particular port on your machine? (I want to be able to see what is 
being sent to and from a program I am writing which isnt quite working properly) 
 
I looked at tcpdump and tcpshow to decode the log it shows... Surely there is a 
program that shows you the text in real time?