You have to indicate a range of IP addresses that the program will scan, one at a time, to find out if the destination computer is active or not. The information that the program provides is the MAC address, and the name of the network card producer.
Find MAC Address also allows you to choose the method with which the network will be scanned ARP, Netbios, NET API or WMI.
For Windows 2000, XP, 2003 and Vista. The application is free for non-commercial use. It requires an activation code after 30 days of use. Obtain this code here.