NEW: Arping 2.x is for Libnet 1.1.x, arping 1.x is for libnet 1.0.x.
Broadcasts a who-has ARP packet on the network and prints answers. VERY useful when you are trying to pick an unused IP for a net that you don't yet have routing to. Then again, if you have no idea what I'm talking about then you prolly don't need it.
It looks like ping (sort of)
It can ping ethernet addresses (if the target has IP configured)
Nice README with an FAQ
OSs: Linux, {Free,Net,Open}BSD, MacOS X, Solaris (and probably more).... and yes, even Windows (binary here)
