What? It's a new freeware tool designed to quickly help you locate the right Scope ID to use when trying to send packets to a neighboring link local IPv6 address. For instance, you could use it to find the ScopeID when you needed to use command line ping to find out if IPv6 is working on the workstation across the room. I'm talking about the part of the link local address after the percent sign: fe80:11:22:33%6, where '6' is the Scope ID of the network interface on your machine that connects to the network that routes packets to the machine with the IPv6 address fe80:11:22:33.
Read about it and download it here.