DomainTools - Domain name search tool that allows a wildcard search, monitoring of WHOIS record changes and history caching, as well as Reverse IP queries. - http://www.domaintools.com/
dot cd registry - Search for .cd domain names. - http://www.cd/
Kloth.net - Universal whois service to look up internet domain information, works with many different TLDs. - http://www.kloth.net/services/whois.php
DomainLocators.net - Domain name registration featuring several domain extensions. - http://domainlocators.net
Order Your Domains - Domain name availability and whois searches. - http://orderyourdomains.com/
RegisterDomain.Net - Domain Name lookups, registrations, and transfers. - http://www.registerdomain.net
getawebpagename.com - Domain name registration and other services. - http://www.getawebpagename.com
NetRegister.biz - Domain registrations offering many extensions. - http://www.netregister.biz
Dotster - Domain name registration and web hosting services. - http://www.dotster.com/
iDotz.Net - Domain name registrar offering several choices of domain extensions. - http://www.idotz.net
Whoisd - Universal server for domain name lookups. - http://www.whoisd.com/
IP Whois - Identifies the owner and the IP address of the domain. - http://www.arin.net/whois/index.html
uk1.co.uk - UK based domain name registration company offering various domain extensions. - http://www.uk1.co.uk
myDiscountDomains.com - Registration and transfer all TLDs, services includes URL forwarding and email forwarding. - http://www.mydiscountdomains.com/
Afilias - Search for the availability of .info domain names. - http://www.afilias.com
Nename.bz - Offering .bz name registrations only. - http://nename.bz
dnsExit.com - Domain registration and searching tools. - http://www.dnsexit.com/
Domainland.com - Domain name registrations, transfers and renewals. - http://www.domainland.com
Whois Search - Whois search for many domain extensions. - http://www.whois-search.com
DrWhois.com - Domain and IP lookup tool. - http://www.drwhois.com
dropPal Expired Domains Checker - Search a list of domain names to locate the best expiring and expired domains with traffic, link popularity, and directory listings. - http://www.droppal.com/
easyWHOiS - Lookup domains across all registrars and most country codes. - http://www.easywhois.com/
DomainPeople.com - International accredited top level domain registrar. - http://domainpeople.com/
DomainLookup - Basic domain name lookup service. - http://brettco.org/dom.html
Schwarzl s Internet Tools - Domain check, email validation, webserver and IP check. - http://www.schwarzl.com/
Domain Fellow - Generates domain names. Combines keywords with a database of popular words. Provides multiple and custom domain name combination and query. - http://www.domainfellow.com/
Search Domains - Search for available domain names in over 150 extensions, including .com, .net, .org, co.uk, and .cc names. - http://www.searchdomains.com/
JPNIC Whois Gateway - Search domain names in English or Japanese. - http://www.nic.ad.jp/cgi-bin/whois_gate
SpaceReg.com - Whois gateway with domain lookups and other tools. - http://www.spacereg.com/
MyBaptism.com - Register your given name as a domain name. - http://www.mybaptism.com/
Checkdomain.com - Connects to the various domain registration databases around the world and displays the current status of a domain name. - http://www.checkdomain.com/
BookMyName.com - Registrar for domain names located in France. - http://www.bookmyname.com
Cool-Whois - Domain search that features historical caching of whois information. - http://www.coolwhois.com/
DomainSearch.com - Search various domain extensions in real time. - http://www.domainsearch.com/
NS.com - Domain name tools and web hosting services. - http://www.ns.com/
Fasterwhois.com - Searches the databases of all registrars of generic top level domains. - http://www.fasterwhois.com/
The Big Whois - Search the database and register your domain name. - http://www.thebigwhois.com/
Name Droppers - Offers searches for domain names using multiple keywords. - http://www.namedroppers.com/
XWhois.com - Whois service to check domain registration from nearly all registries worldwide. - http://xwhois.com/
Better-Whois.com - Queries all registrars and allows users to receive detailed whois reports via e-mail. - http://www.better-whois.com/
Edepot.com - Allows to search for available domain names and explains the relationship between country names and domain IPs. - http://www.edepot.com/irres.html