Ad Interchange -- Advertising Marketplace
   An online marketplace for worldwide advertising and media markets. Provides links for advertisers and ad agencies with firms owning advertising space, to conduct transactions in an automated fashion.
   http://www.adinterchange.com

Ad Resource
   Internet advertising and web site promotion resources.
   http://adres.internet.com/

AdForum
   A comprehensive portal to the advertising, marketing and communications industry, with direct links to 17,116 agencies in 137 countries. Includes current industry news and a searchable database to creative portfolios, campaigns, consultants and trade orga
   http://ww0.adforum.com

AdFree
   A business marketing directory offering links for advertising and education.
   http://www.adfree.com/

AdHub
   A directory of the advertising industry in Upstate New York. Searches through 150 categories. Site also features company portfolios, press releases, jobs, a regional calendar, columns and case studies.
   http://www.adhub.com

AdPeople
   Providing those interested in advertising, its science and everyday issues. Also find media people, creatives, marketers, directors and owners of ad agencies.
   http://www.adpeople.net/

Advertiser and Agency Red Books Online
   Information for thorough research on advertising agencies and advertisers worldwide. This resource has a 100 years of history within the industry.
   http://www.redbooks.com

Advertising
   Listings of business advertising specialties and promotional products for businesses located in Florida.
   http://floridadirectory.biz/html/Advertising/

Advertising Database
   A searchable database American brands and their media planning agencies. Contains names, direct dials and current data within the year.
   http://www.advertisingdatabase.com

Advertising Exposure
   Search engine and directory of high quality internet advertising resources that are free or low in cost.
   http://www.advertising-exposure.com

Agency ComPile
   Comprehensive up-to-date directory of marketing communications agencies, offers a searchable database of the advertising, public relations, direct marketing, sales promotion and media buying agencies.
   http://www.agencycompile.com/

Agencyfinder.com
   Site provides a service for client and advertising agency matchmaking. Advertisers can search a directory of 4,000 Certified advertising and public relations agencies, at no cost, to find firms for hire. Database includes backgrounds, capabilities and oth
   http://www.agencyfinder.com

American Agencies In America
   Directory of advertising agencies in the United States and Canada, sorted by major cities. Site includes profiles, direct links to ad agencies and listings of industry job opportunities.
   http://www.americanadagencies.com

American Directory of Creative Services
   Provides a comprehensive list of US advertising and creative professionals and resources categorized by city and state. Includes links to media resources and organizations.
   http://www.creative-info.us

BtoB Online Directory
   Business-to-Business advertising and marketing directory.
   http://www.btobonlinedirectory.com/

Directory of Advertisers and Marketers
   An interactive showcase of advertising and marketing companies sorted by region and types of services offered. Links to registered companies are provided.
   http://www.advertisersandmarketers.com/

Greenbook
   Worldwide directory of marketing research and focus group companies and services. Detailed company information.
   http://www.greenbook.org

Internet Advertising Guide.
   Providing information and resources for Internet advertising and web traffic.
   http://www.coolmediaplacement.com

Internet Marketing Resources Directory
   A human-edited directory of Internet advertising resources, products, services and practices.
   http://www.a4networks.com/jade/jade.php

MarcommWise Vendor Directory
   Categorized directory of companies selling marketing communications products and services.
   http://www.marcommwise.com/vindex.html

MarketingHub
   Searchable database of marketing experts, organized by topics and categories of expertise.
   http://www.marketinghub.com

Media Directory
   Provides advertising media information on newspapers, magazines, television, cable, radio, online and out-of-home properties in the United States.
   http://www.mediadir.com

Paintedcows.com
   Advertising and marketing resource.
   http://paintedcows.com/

Pittsburgh Advertising Agency and Graphic Design Directory
   A listing of advertising agencies,graphic design firms, and public relations agencies in the Pittsburgh area.
   http://www.pittsburghcreative.com

SIC NAICS Codes
   Provides complete databases of SIC and NAICS codes to assist in target marketing.
   http://www.sic-naics-codes.com

The Marketer's Portal
   A directory of over 5,500 hand picked links to sites of use and interest to marketing and media professionals. It includes a communications timeline and 20 news feeds.
   http://www.marketersportal.com/

TopIdeas.com
   Catalog, search engine, promotion and rating system for new ideas, products, inventions, advice and shared knowledge.
   http://www.topideas.com/

WARC.com
   Searchable database of over 25,000 articles, case studies and summaries from 30 global content sources. Includes daily industry news service, advertising data & statistics and best practice papers.
   http://www.warc.com