Top 18 Free CSS3 Resources To Build Fast Lightweight Websites

This page summarizes the projects mentioned and recommended in the original post on dev.to

CodeRabbit: AI Code Reviews for Developers
Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
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Nutrient – The #1 PDF SDK Library, trusted by 10K+ developers
Other PDF SDKs promise a lot - then break. Laggy scrolling, poor mobile UX, tons of bugs, and lack of support cost you endless frustrations. Nutrient’s SDK handles billion-page workloads - so you don’t have to debug PDFs. Used by ~1 billion end users in more than 150 different countries.
www.nutrient.io
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  1. Sass

    Sass makes CSS fun!

    5. SCSS (Sassy CSS)

  2. CodeRabbit

    CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.

    CodeRabbit logo
  3. less.js

    Less. The dynamic stylesheet language.

    4. LESS (Leaner Style Sheets)

  4. UI kit

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

    3. UIKit

  5. Bootstrap

    The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

    1. Bootstrap

  6. Base

    Base - A Rock Solid, Responsive CSS Framework built to work on all devices big, small and in-between.

    14. Base

  7. foundation-rails

    Foundation for Rails

    2. Foundation

  8. Toast

    🍞 A highly-customizable, responsive (S)CSS grid

    6. Toast

  9. Nutrient

    Nutrient – The #1 PDF SDK Library, trusted by 10K+ developers. Other PDF SDKs promise a lot - then break. Laggy scrolling, poor mobile UX, tons of bugs, and lack of support cost you endless frustrations. Nutrient’s SDK handles billion-page workloads - so you don’t have to debug PDFs. Used by ~1 billion end users in more than 150 different countries.

    Nutrient logo
  10. Bulma

    Modern CSS framework based on Flexbox

    8. Bulma

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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Did you know that CSS is
the 16th most popular programming language
based on number of references?