iNet Network Scanner provides you with information about networks your Mac is connected to. Its very easy and user friendly design allows even the unexperienced user to get a profound and understandable overview of a network and the running services. iNet is also available as iPhone and iPad App via the iTunes Store.
In the current version the following functions are available:
Portscan for standard ports
Wake on Lan
[Added] Sorting of scan results via MAC address (switch via preferences)