cdnjs is a free distributed JS library delivery service.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Issuu is a digital discovery and publishing platform.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Prototype is a JavaScript Framework that aims to ease development of web applications.
Pure CSS is a set of small, responsive CSS modules that can be used in web projects.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.