Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
cdnjs is a free distributed JS library delivery service.
Hostinger Content Delivery Network (CDN).
Hostinger is an employee-owned Web hosting provider and internet domain registrar.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Mailchimp is a marketing automation platform and email marketing service.