HTTPie is a command line HTTP client with an intuitive UI, JSON support, syntax highlighting, wget-like downloads, plugins, and more.
You may also be interested in ...
Tailwind Kit
A beautiful and large components kit for TailwindCSS 2.0. tailwind Kit gives you access to over 200 CSS responsive components, based on Tailwind CSS 2.0 and Font Awesome. It's all free and open-source.
Front-end developer handbook 2019
This is a guide made by Frontend Masters that everyone can use to learn about the practice of front-end development. It broadly outlines and discusses the practice of front-end engineering: how to learn it and what tools are used when practicing it in 2019.
Mozaic
Mosaic is a declarative front-end JavaScript library for building user interfaces.