1. Spectre is a web application to diff screenshots.

  2. A CSS framework that actually looks good.

  3. Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.

  4. A lightweight and modular front-end framework for developing fast and powerful web interfaces

  5. A modern responsive front-end framework based on Material Design

  6. The most advanced responsive front-end framework in the world

  7. A UI Component library implemented using a set of specifications designed around natural language

  8. MUI is a lightweight HTML/CSS/JS framework that follows Google's Material Design guidelines