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.
Clicky is web an analytics tool which helps you to get real-time analysis including spy view.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Plesk is a web hosting and server data centre automation software with a control panel developed for Linux and Windows-based retail hosting service providers.