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.
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Copypoison is a plagarism protection tool that protects content by replacing text with symbols that are visually similar.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.