Accrue
www.accrue.com
Accrue's debut product, Insight, is a visual measurement and analysis system designed to scale to the most heavily visited Web sites.

AdRelevance
www.adrelevance.com
AdRelevance is an information technology firm specializing in the automated retrieval and delivery of online advertising data. The AdRelevance Service enables marketers to measure where, when and how much their competition is advertising on the Internet.

Advertising Research Foundation
www.arfsite.org
Founded in 1936 by the Association of National Advertisers and the American Association of Advertising Agencies, the Advertising Research Foundation (ARF) is a nonprofit corporate-membership association which is the preeminent professional organization in the field of advertising, marketing and media research. Its combined membership represents more than 350 advertisers, advertising agencies, research firms, media companies, educational institutions and international organizations. The principal mission of the ARF is to improve the practice of advertising, marketing and media research in pursuit of more effective marketing and advertising communications.

CyberAtlas
www.cyberatlas.com
CyberAtlas is an Internet Research Guide.

Digitrends
www.digitrends.com
Through its family of information resources, Digitrends inspires interactive marketing strategies through case studies, peer-to-peer exchange, industry news and insightful analysis.

eMarketerStats
www.emarketer.com/
One of the best resources anywhere for online statistics, news, and features.

Forrester Research
www.forrester.com
Forrester analyzes and predicts the course of technological change, and provides insight into the impact of emerging technologies on businesses, consumers, and society. (Subscription Required)

Gomez Advisors
www.gomez.com
Gomez Advisors provides decision support to consumers who want to transact online and information to businesses that want to attract and retain online consumers. Through the benchmarks established in the Gomez Internet ScorecardsT, consumers can make more informed decisions about doing business on the Internet. E-commerce companies can evaluate their performance against the competition, identify ways to better serve consumers and gain a better understanding of what elements, services and features determine a successful e-commerce site.

GVU Center's WWW user survey
www.cc.gatech.edu/
The Graphics, Visualization, & Usability (GVU) is a research center affiliated with Georgia Tech's College of Computing (COC). The GVU conducts World Wide Web User Surveys.

IDC Research home page
www.idcresearch.com
IDC is a provider of market information, industry analysis, and strategic and tactical guidance to builders, providers, and users of information technology.

Internet Domain Survey
www.isc.org/dsview.cgi?domainsurvey/
Raw data on the number of hosts, domains, and Nets. COM, EDU, NET, GOV, ORG, MIL, DE (Germany), UK (United Kingdom), CA (Canada), AU (Australia) top the list of domains.

I/PRO
www.ipro.com
I/PRO provides services and software for independent measurement and analysis of Web site usage. The I/PRO System enables organizations to understand who is using their sites and why. Moreover, advertisers and media buyers can use the I/PRO System to determine the optimal sites for delivering their messages.

Jupiter Communications
www.jmm.com
Jupiter Communications Inc. is a provider of research on Internet commerce. Jupiter's research, which is solely focused on the Internet economy, provides clients with comprehensive views of industry trends, forecasts and best practices.

Media Metrix
www.mediametrix.com
Media Metrix provides syndicated audience measurement services, advertising occurrence measurement through its acquisition of AdRelevance, technology measurement and e-commerce measurement services.

NetCount
www.netcount.com
NetCount LLC is a third-party Web site measurement service with a suite of products and services designed to meet the combined measurement needs of Web sites, Media buyers and Advertisers. NetCount has a free third-party reporting service for start-up Web sites called NetCount Basic (TM), detailed reporting updated daily through NetCount Plus (TM), and Web advertising performance reporting with NetCount AdCount (TM).

NetRatings
www.netratings.com
NetRatings offerings include Internet audience measurement and market analysis, E-Commerce Strategies and Custom Research.

NUA
www.nua.ie
Nua is an Internet consultancy and developer specializing in projects for large organizations and software companies.

Powerize
www.hoovers.com
Hoovers.com is the Internet's ultimate source of business and investment research. The site provides information from more than 10,000 brand name, trusted publications and other sources around the world

SRDS on-line
www.srds.com
Standard Rate & Data Service provides rate and data information to media professionals.