reCAPTCHA reCAPTCHA

CAPTCHA: Telling Humans and Computers Apart Automatically
http://www.captcha.net

A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't:

They might not have a twitter profile at the moment.

Looks like they don't have a facebook page yet.

www.captcha.net

Domain quick infos:http://www.captcha.net

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List of websites/webpages that are using reCAPTCHA technologies
SiteTechnologies
friendster.com  NGNix Server reCAPTCHA Google fonts jQuery Google Analytics Amazon CloudFront (CDN) Facebook Social plugins 
centillien.com  Cake PHP Apache HTTP Server Project reCAPTCHA jQuery jQuery UI Google Analytics Google Plus One AddThis bookmarker 
ourawesomeplanet.com  Apache HTTP Server Project Varnish Cache Youtube videos Google Loader Pinterest - "Pin It" Button widget reCAPTCHA Google Analytics Quantcast Scorecard Research StatCounter Adsense Aweber Communication - Email marketing Google Maps API / Static Maps Facebook Social plugins Google Plus One ShareThis widgets 
ring.resumup.com  Posterous Space Blog hosting NGNix Server Varnish Cache Modernizr reCAPTCHA jQuery Google Analytics Quantcast Facebook Social plugins Twitter plugins Google Maps API / Static Maps 
jared201.posterous.com  Posterous Space Blog hosting NGNix Server Varnish Cache Modernizr reCAPTCHA jQuery Google Analytics Quantcast Facebook Social plugins Twitter plugins Google Maps API / Static Maps 
rutube.ru  reCAPTCHA 
adonianatur.com  Magento Google Translate reCAPTCHA jQuery Scriptaculous script (Script.aculo.us) prototype script jQuery UI Google Analytics 
groundwire.org  Plone CMS reCAPTCHA jQuery Apple Touch icons TypeKit jQuery UI Google Analytics Facebook Social plugins 
javaworld.com  Percussion Rhythmyx/CMS System reCAPTCHA Google Analytics Quantcast Adsense DoubleClick 
allvoices.com  reCAPTCHA Google Analytics Scorecard Research Facebook Social plugins Google Plus One Twitter plugins 
bulleplongee.fr  ASP.Net Web Application Framework reCAPTCHA Google Analytics Adsense Amazon CloudFront (CDN) 
editorial.equities.com  WordPress Blog/CMS reCAPTCHA jQuery jQuery UI Google Analytics Facebook Social plugins Google Plus One AddThis bookmarker 
baidu.com.bd  WordPress Blog/CMS Google Translate reCAPTCHA Google fonts jQuery Mootools Google Analytics Quantcast Alexa Stats widgets Facebook Social plugins Adsense infolinks ads 
kreaweb.cl  reCAPTCHA jQuery Apple Touch icons Google Analytics Google Plus One Twitter plugins W3C HTML5 Logo Badge 
adlesse.com  reCAPTCHA Cufon fonts jQuery 
stanlemon.net  Posterous Space Blog hosting Modernizr reCAPTCHA jQuery Google Analytics Quantcast Facebook Social plugins Twitter plugins Google Maps API / Static Maps 
boxysystems.com  WordPress Blog/CMS jQuery Google Analytics LinkedIn plugins / sidebar widget reCAPTCHA 
boonex.com  reCAPTCHA jQuery Apple Touch icons Google Analytics Facebook Social plugins Google Plus One 
friendster.com  Google Analytics Amazon CloudFront (CDN) jQuery Facebook Social plugins Get Satisfaction reCAPTCHA 
bebo.com  reCAPTCHA jQuery Mootools Google Analytics 
20 out of 23 websites built with reCAPTCHA technologies