Top 11 Open-Source Alternatives to CSS Reference

Product categories

Automated Testing Browser Testing CSS CSS Framework CSS Games CSS Tools CSS Tutorials Design Tools Developer Tools Development Tools Tech Website Design

Summary

The top open-source alternatives to CSS Reference are Flexbox Froggy, CSS Grid Garden, and htmlreference.io. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Flexbox Froggy Landing Page
1

Flexbox Froggy

A game for learning CSS flexbox
Pricing:
- Open Source
#CSS Tools #Online Education #Design Tools 252 social mentions
CSS Grid Garden Landing Page
2

CSS Grid Garden

A game for learning CSS grid layout
Pricing:
- Open Source
#CSS Tools #Design Tools #Other Education Tech 99 social mentions
htmlreference.io Landing Page
3

htmlreference.io

Learn by example with this free web-based guide to HTML.
Pricing:
- Open Source
#CSS Tutorials #CSS #Online Learning 1 social mentions
Bulma Landing Page
4

Bulma

Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.
Pricing:
- Open Source
#CSS Framework #Development Tools #Design Tools 109 social mentions
Can I use Landing Page
5

Can I use

Compatibility tables for support of HTML5, CSS3, SVG and more in desktop and mobile browsers.
Pricing:
- Open Source
#Website Testing #Browser Testing #CSS 349 social mentions
Tailwind CSS Landing Page
6

Tailwind CSS

A utility-first CSS framework for rapidly building custom user interfaces.
Pricing:
- Open Source
#Developer Tools #Design Tools #Website Design 871 social mentions
Bootstrap 5 CheatSheet Landing Page
7

Bootstrap 5 CheatSheet

The only Bootstrap 5 CheatSheet you will ever need.
Pricing:
- Open Source
#Productivity #Developer Tools #Tech 7 social mentions
Responsively Landing Page
8

Responsively

Develop responsive web-apps 5x faster!
Pricing:
- Open Source
- Free
- Free Trial
#Design Tools #Developer Tools #Tech 36 social mentions
Foundation Landing Page
9

Foundation

The most advanced responsive front-end framework in the world
Pricing:
- Open Source
#CSS Framework #Design Tools #Development Tools 18 social mentions
Bootstrap Landing Page
10

Bootstrap

Simple and flexible HTML, CSS, and JS for popular UI components and interactions
Pricing:
- Open Source
#CSS Framework #Development Tools #Design Tools 328 social mentions
Sass Landing Page
11

Sass

Syntatically Awesome Style Sheets
Pricing:
- Open Source
#Developer Tools #Design Tools #Javascript UI Libraries 133 social mentions