Free Online Lookups for IP location, people finder, phone number lookups and address lookup for longitude and latitude, the county, time zone, house of representative member, income, home prices and more. Lots of demographic information. May require free registration.
DNSstuff.com (DNS timing, tracert, ping, smart WHOIS lookup, NetGeo, etc.) and DNSreport.com return very informative reports about domains, no registration required.