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.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
jQuery plugin for seeing if the images are loaded.
Lightbox is small javascript library used to overlay images on top of the current page.
Swiper is a JavaScript library that creates modern touch sliders with hardware-accelerated transitions.