Fruitcake

Its kind of a Trojan Proxy. No big deal, it just listens on a pre defined port, 
 and makes a connection to another port. All Data that is transferred will be visible
 in text boxes. You might now ask, so what is it useful for? You can use it to have
 it act as a proxy between a Trojan Client and its Server. That means that you will
 see all the commands that are sent from the client to the Server and vice versa all
 answers from the Server to the Client. This can be used to study the Trojan
 functions or to make a list of the commands the client uses. Most Trojans could be
 used with Telnet as a client if you would know the right commands
 
 ISO