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.
cdnjs is a free distributed JS library delivery service.
Jekyll is a blog-aware, static site generator for personal, project, or organisation sites.
Lighttpd is an open-source web server optimised for speed-critical environment.