Websites using some form of Captcha technology on them.
Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.
Liferay Portal is the leading open source portal for the enterprise, offering content management, collaboration, and social out-of-the-box.
CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.
Google APIs are application programming interfaces developed by Google which allow communication with Google Services and their integration to other services.
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook