Websites using some form of Captcha technology on them.
jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. Whether you're building highly interactive web applications or you just need to add a date picker to a form control.
This site uses the viewport meta tag which means the content may be optimized for mobile content.
Google+ Sign-In button allows users to authenticate on websites using their Google+ account.
Google+ platform websites integration using the Google+ platform tag.
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.