Google Analytics is a service offered by Google that generates detailed statistics about a website's traffic and traffic sources and measures conversions and sales. Google Analytics can track visitors from all referrers, including search engines and social networks, direct visits and referring sites. It also displays advertisin...
webgozar.com analysis and statistics. Extremely useful web analyzer, that provides information about Alexa rank, traffic report, geolocation, ...
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Really Simple Discovery is a way to help client software find the services needed to read, edit, or "work with" weblogging software.
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.