The set includes both ordinary and unique utilities, well, let's get everything in order (as presented on the site).
1. 
Port Forwarding Tester - a tool to check the external IP-address and detect open ports.

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2. 
Network Location Tool is a utility that allows you to determine the geophysical location by ip-address using Google Maps. 

3. 
Visual Trace Route Tool - visual tracing, thanks to which we will be able to observe how our “bags” move :)

4. 
Phone Number Geolocator - allows you to determine the geographical area by phone number where it is actually located. Currently, only phones within the US are supported.

5. 
Reverse IP Domain Check - displays sites located on the same server. Data collected from search engine results.

6. 
WHOIS Lookup Tool - displays full information (as far as possible;)) by domain or ip-address. In general, the usual WHOIS.
If you prefer, you can add a gadget to the 
iGoogle page or to the sidebar in 
Vista .
It is impossible not to mention the resource 
makeuseof.com , thanks to which I find something new for myself once again.