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.
Fourthwall helps to create and launch a branded website.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Plausible is an open-source alternative to Google Analytics.
Tiny Slider is a vanilla javascript slider for all purposes.