Academic sites 

Central and Eastern European Education Directory

JANET - the UK's education and research network

Shools Worldwide - the online Directory of Education

University and College Directory in North America

UK University Directory

Universities and Colleges all over the world

 Domain Names 

Authority & Reference

IANA
The Internet Assigned Numbers Authority

ICANN (Internet Corporation for Assigned Names and Numbers)
ICANN oversees the .com, .org and .net top-level domains

International Accreditation-Qualified Registrars list
From ICANN The Internet Corporation for Assigned Names and Numbers

NETSOL
TLD Registry

Nominet UK
The Registry for .uk Internet Domain Names

Domain / IP Lookup

APNIC Whois Database Search
Asia Pacific Network Information Center

ARIN Whois Database Search
American Registry for Internet Numbers

LACNIC
Latin American and Caribbean IP address Regional Registry In English, Portuguese, Spanish

RIPE whois database search
Réseaux IP Européens Network Coordination Centre

Whois
TLDs Domain lookup

Allwhois™
Complete whois domain name search for all domain names in the world.

Whois Lookup Proxy
(geektools.com)

Search, Registration & Auction

1&1 Internet - Domains and hosting from £1.99

Domains and Web Hosting Packages from Yahoo!

Unicode Domain Names 中文, 日文, 韩文 网域名搜索和注册
Multilingual Domain Name Search & Registration for Tradition & Simplified Chinese, Japanese & Korean.

 Earth Science 

Global Change Master Directory - NASA
Agriculture, Atmosphere, Atmosphere, Biological Classification, Climate Indicators, Cryosphere, Human Dimensions, Land Surface, Oceans, Paleoclimate, Solid Earth, Spectral / Engineering, Sun-Earth Interactions, Sun-Earth Interactions, Terrestrial Hydrosphere ...

 Environment 

The Environment Directory

 Law 

FindLaw's Lawyer Directory
Find Lawyers - Attorneys - Law Firms - (US)

LawyerLocator UK
also LawyerLocator International

Law School Directory

 Librarian 

Librarians' Internet Index

 Logistics 

LogisticsWorld
The Worldwide Directory of Transportation and Logistics
with ReferenceTools for Airlines, Airports / Airport Codes, Seaports / Seaport Codes, U.S. Customs Brokers, Transport / Logistics Acronyms, NAICS and SIC Codes, Harmonized Tariff Schedule, Country Profiles, World Time Zones, World Time Clock, ISO 3166 Country Codes, ISO 4217 Currency Codes, FIPS Country Codes, U.S., Government Links, Software Links, Lean, Six Sigma Links, Travel Destinations, Hot Links, Weights and Measures ...

 Movies 

The Internet Movies Database
Visited by over 57 million movie and TV lovers each month

Search for movies

 Music 

AllMusic
Music search

 People / Email Search 

Canada

Canada 411
The Phone Directory - Find person and business

Global

Around People Finder
Find people in Britian, England, UK, Australia, New Zealand, USA, Europe, World-wide - School Friends, college mates, drinking partners, lost friends, family members, co-workers, people you grew up with, clubs, societies, Army, Navy, RAF in fact anyone.

Intelius Background checks

Intelius People Search

UK

192.com
Search from Electoral Roll, Business Search , Company Reports etc…..

BT British Telecom
The Phone Book - Person & Business Directory

People Search Tracing Services
Birth, Marriage or Death index and Family history research including tracing living relatives.

PeopleTrace
Search from indexes to Births Marriages and Deaths for England and Wales, Electoral Roll records and the BT OSIS database.

US

AnyWho - AT&T
Find phone numbers, addresses, maps & directions for Business and People in the US

Bigfoot Email Search

Reunion Find People

 Pharmaceutical 

Pharmaceutical Company Directory

 Singer / Songwriter 

Singer / Songwriter Directory

 World Telephone Directory 

Search the World Telephone Directory

World Telecom Directory from CITEL