Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Friendly Captcha is a proof-of-work based solution in which the user’s device does all the work.
ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Umbraco is an open-source Microsoft ASP.NET based content management system.