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Scany's a network scanner similar to Net Master, except better designed, and a lot better looking (I've used both).
It does ping, trace route, whois, Bonjour/Reverse DNS/Windows(SMB?) name lookup, TCP/UDP port scanning, as well as vendor identification via MAC address. You can group hosts in named groups - "Home", "Work", "Internet etc" - so that you only see the ones you're interested in working with at the moment. Oh, and it does Wake on LAN, too.
Finally, it looks cool - green screen text, and little animations that make it look like a movie-style "hacker tool". The trace route function especially looks the part - all smooth scrolling and sliding text, as it fills out country and AS of each host.
I bought it for 99c a year ago, and haven't regretted it since. You might not either ;-)
Awesome app. I have a pirate copy on my JB phone but it's definitely the best one of its type I have found.