ok...I am appealing to all the gods of what is good and unholy in network security. Actually I just figured the collective conscious knows a lot of things that I have never heard of. I am looking for a tool (preferably free) that will scan a network and provide the hostname, MAC, and IP. This is a multiple platform environment, so I will need something that will provide this info for infrastructure, unix based, macintosh based, and windows based equipment. Any ideas? It doesn't have to be a single tool either. Can be multiple tools and hopefully the tools are fast. The tools can also be *nix based or Windows based. I am currently playing with Nmap and sifting through its Man.

Thanks in advance