StatMarket Updated daily and based on stats from over 65,000 sites. Everything from search engines, browsers to screen resolutions, ISPs. http://www.statmarket.com/

Netcraft Web Server Survey A monthly updated survey of web server software usage on computers connected to the Internet. Also surveys most popular websites, and top level domains. http://www.netcraft.com/Survey/

Browser stats Browser usage stats from the major sites and some annalysis http://www.upsdell.com/BrowserNews/stat.htm

Cooperative Association for Internet Data Analysis CAIDA collects, monitors, analyzes, and visualizes several forms of Internet traffic data concerning network topology, workload characterization, performance, routing, and multicast behavior. http://www.caida.org/

Global Internet Statistics An up-to-date chart of the estimated number of people online in each language. http://glreach.com/globstats/

Behind the Numbers A handy repository of news and analysis of key Internet metrics and indicators. From the editors of CIO.com. http://www2.cio.com/metrics/metrics.cfm

NEC Research Institute: Size of the Web Provides results of statistical search engine studies. http://www.neci.nec.com/~lawrence/websize.html

EuropeProfile Your source for research intelligence data on European E-business trends, demographics and strategies. http://www.europeprofile.com

Geography of the Internet Data, maps and analysis on the geographic distribution of Internet domain names by city, region, state, and country. http://www.zooknic.com/

Nielsen//NetRatings Information on Website usage, internet access, and advertising data. http://www.nielsen-netratings.com

NetRadar Insights, facts, trends and numbers at a glance. http://www.netstatistica.com/netradar.cfm

Internet Economy Indicators Facts and figures about the internet including data on e-commerce. http://www.internetindicators.com

Internet Mapping Project: Map gallery Contains graphical representations of the Internet. Looks like star maps, but with websites grouped by ISP. http://www.cs.bell-labs.com/who/ches/map/gallery/

Security Space Monthly published research reports covering issues like web server market share, popularity of web sites, and web authoring tools. https://secure1.securityspace.com/s_survey/data/

iDiary - Internet Measurement System Combines Internet tracking with surveying to deliver knowledge about the Natural Population of your web site. http://www.viewstatsresearch.com/

.gr survey home About Internet in Greece, by NET Letter. In greek and english. http://www.open.gr/survey/000331/eng/

European Internet Stats European Internet stats, trends, and strategies. http://www.altevie.net/mediagraphix/europeaninternetstats/

Major Internet Backbone MAPs Maps of Internet backbones, sorted by market share. http://navigators.com/isp.html

Netvalley IT history, reports, stats and ranks. http://www.netvalley.com/

Internet Domain Survey Attempts to discover every host on the Internet by doing a complete search of the Domain Name System. Statistics available for free and commercially. http://www.isc.org/ds/