Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.
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.
RequireJS is a JavaScript file and module loader. It is optimized for in-browser use, but it can be used in other JavaScript environments, like Rhino and Node.
Sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development.
Using Private & Public CDNs on a single page can hurt performance. PageCDN solves this by combining public & private content on one
CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.
This site uses the viewport meta tag which means the content may be optimized for mobile content.
websites using the $ symbol on their website - meaning it may accept payment in this currency used in Israel.
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.
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.