Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Constant Contact is a marketing automation and email marketing solution.
LiteSpeed is a high-scalability web server.
Magento is an open-source ecommerce platform written in PHP.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Prototype is a JavaScript Framework that aims to ease development of web applications.