1. WebNameSource Tools Whois
Look up a domain to see if it is available.
NameSpin
Spin names in combinations to find a domain name.
2. Others' Tools Traceroute at Visualware
Map of the route to any IP you specify.
TRaceRT
Monitoring, index to many traceroute tools.
Ping at Fifi.org (Frisco)
Find out how long it takes to connect to your site (also Traceroute).
ARIN Whois
Find out who obtained an IP number from ARIN.
IP Address World
What is your own Internet IP address?
DNS Report
Get an analysis of the DNS records on a domain, including MX.
DNS Locator
How many domains does a nameserver host?
DeletedDomains
Search on your keywords for recently deleted domains you can register.
ExpireSoft
Search for expiring or recently deleted domains you can register.
Search Popularity
How popular is your domain on some search engines?
3. Site/Domain spam and related tests SpamCop IP check
See if an IP address is on SpamCop's blacklist
OpenRBL
Check multiple blacklists, also a Whois, links to route tracing
5. Geographic Tools TGN - The Getty Thesarus
Find your numeric geographic location for metatags
GeoTags
Graphical tool to locate your latitude and longditude for meta tags.
Multimap
Map tool to locate your latitude and longditude for meta tags.
6. Information DNS.net
Information on how the DNS system works
7. Tag Generators Refresh tag generator
Generate a redirect meta tag using the refresh command.