http://www.mikrotik.com/thedude.php
That was a nice rug, it brought the room together
Anyone who has ever wanted to map out their network, this tool is pretty sweet. It’ll allow you do just about everything you needed to do on a network from a lovely GUI. Its pretty sweet! 
Also, the developer is a man after my own heart. When going out to get various resources on your network, it tells you “getting stuff”. Nice!
