Quantcast helps advertisers and publishers better understand, find and access targeted audiences in real-time. Marketers use Quantcast to amplify their targeting and reach consumers who look just like their best performing customers with unprecedented performance and scale. Publishers use Quantcast to directly measure and packag...
Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.
CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Varnish is an HTTP accelerator designed for content-heavy dynamic web sites. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed as an HTTP accelerator. Varnish is focused exclusively on HTTP, unlike other pro...
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.
Meta descriptions are HTML attributes that provide concise explanations of the contents of web pages. Meta descriptions are commonly used on search engine result pages (SERPs) to display preview snippets for a given page.
Sites who has this tag are verfied by google to use WebMaster tools
The http-equiv attribute provides an HTTP header for the information/value of the content attribute. The http-equiv attribute can be used to simulate an HTTP response header.
Meta Keywords are a specific type of meta tag that appear in the HTML code of a Web page and help tell search engines what the topic of the page is.
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.