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.
Google Forms is a free online form builder that allows you to create and publish online forms, surveys, quizzes, order forms, and more.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Tiny Slider is a vanilla javascript slider for all purposes.