We’ve seen a huge rise in popularity of Flexbox layouts, subtle CSS animations, SVG usage, Structure Styleguides, Instagram-style effects, deeper CSS integration with mainstream applications, like Photoshop and Sketch, and CSS preprocessors, like Sass and Less, are continuing to gain widespread acceptance.
Not only CSS is maturing beautifully, with the help of the many open-source resources released this year, using it and building something robust with it has never been easier.
All 50 of the tools in this collection are time-saving additions to your already existing web design toolbox. So, always pick the right tool for the right project.
All of the tools, libraries, and frameworks have been organized into the following categories:
CSS Animation Tools & Libraries
Rocket
Rocket
Rocket – Simple tool for creating web animations.
Animate Plus
Animate Plus
Animate Plus – JavaScript library that helps you animate CSS properties and SVG attributes.
Tuesday
Tuesday
Tuesday – Quirky CSS animation library.
MOTION UI
MOTION UI – Sass library for creating flexible CSS transitions & animations.
Shift.css
Shift
Shift.css – A Simple framework to build timed, contained CSS animations.
Transformicons
Transformicons
Transformicons – Animated icons, symbols and buttons using SVG and CSS.
CSS Utilities & Tools
PurifyCSS
PurifyCSS
PurifyCSS – Handy utility that detects which CSS selectors your app is using and creates a file without the unused CSS.
CSS Stats
CSS Stats
CSS Stats – Tool that will visualize useful stats about your CSS.
cssfmt
cssfmt
cssfmt – Tool that automatically formats CSS source code.
sanitize.css
sanitize
sanitize.css – Makes browsers render elements consistently and allows you to style with today’s best practices out-of-the-box.
Flexbox Tools
Flexbugs
Flexbugs
Flexbugs – Community-curated list of flexbox issues and cross-browser workarounds
Flexbox in 5 Minutes
flexbox in 5 minutes – An interactive tour of all the major features of the CSS property: flexbox.
flexbox
Sketch Flex Layout
Sketch Flex Layout – Plugin for Sketch that allow for CSS Flexbox layouts.
Sketch Flex Layout
cssPlus – Robust, fast and cross browser layout scaffolding based on Flexbox.
cssPlus
CSS Toolkits
Flickity
Flickity
Flickity – CSS library that makes galleries & sliders feel lively and effortless.
CSSGram
CSSGram
CSSGram – Tiny library for recreating Instagram filters with CSS.
Marx
Marx
Marx – Stylish CSS reset with no Javacript or Classes, just raw CSS.
Pushy
Pushy
Pushy – Responsive off-canvas navigation menu using CSS transforms & transitions.
Drop
Drop
Drop – Library for creating drop downs and other floating elements.
Rucksack
Rucksack
Rucksack – A little bag of CSS superpowers.
Gradify
Gradify
Gradify – Module for producing CSS gradients as placeholders for images.
Tufte CSS
Tufte
Tufte CSS – Tools to style web articles using the ideas demonstrated by Edward Tufte’s books.
Stretchy
Stretchy
Stretchy – Form element auto sizing.
CSSketch
CSSketch
CSSketch – An open source CSS plugin for Sketch.
ai2html
ai2html
ai2html – Open-source script for Adobe Illustrator that converts Illustrator documents into HTML and CSS.
SassyFlags
SassyFlags
SassyFlags
– Simple library for adding flags to your websites.
Crayon.css
Crayon
Crayon.css – A list of CSS variables linking color names to hexadecimal values.
Responsive Web Frameworks & UI Kits
Primer
Primer
Primer – The CSS toolkit and guidelines that power GitHub.
Juiced
Juiced
Juiced – Flexbox CSS framework.
Basscss
Basscss
Basscss – Lightweight collection of base element styles and immutable utilities.
Neutron
Neutron
Neutron – Sass framework for creating flexible, clear, and semantic web layouts.
flexible.gs
flexible
flexible.gs – Responsive and flexible grid system CSS framework (CSS, Sass, LESS and Stylus).
Wee
Wee
Wee – Lightweight front-end framework for logically building complex, responsive web projects.
Rin
Rin
Rin – Lean, gulp-based HTML and SASS boilerplate for better front-end coding.
Scooter
Scooter
Scooter – SCSS framework & UI library from Dropbox.
spaceBase
spaceBase
spaceBase – Sass-based responsive CSS framework.
Rebar
Rebar
Rebar – A Sass/Stylus grid framework.
Decorator
Decorator
Decorator – HTML, CSS, and JavaScript front-end framework.
Concise CSS
Concise CSS
Concise CSS – Framework is written in SASS that’s lightweight and easy-to-use.
minigrid()
minigrid()
minigrid() – Minimal 2kb zero dependency cascading grid layout
Workbench
Workbench
Workbench – Front-end boilerplate build for faster development.
Lost
Lost
Lost – SCSS or Stylus fractional grid system built with calc().
Material Design Frameworks
Material
Material
Material – HTML5 UI framework based on Material Design.
MUI
MUI
MUI – Lightweight Material Design web framework.
LumX
LumX
LumX – Framework based on AngularJS & Material Design specs.
Web-Based CSS Tools & Apps
CIRCULUS.SVG
CIRCULUS
CIRCULUS.SVG – SVG circular menu generator.
CSS Gradient Animator
Gradient Animator
CSS Gradient Animator – Web-based tool for generating animated gradients.
SVGOMG
SVGOMG
SVGOMG – Web-based app for optimizing and configuring SVGO.
Blend
Blend
Blend – Tool for generating simple and beautiful CSS3 gradients.
CSS Ruler
CSS Ruler
CSS Ruler – Handy web-based tool for exploring CSS lengths.
Filter Blend
Filter Blend
Filter Blend – CSS blend modes and filters playground & generator.
SVG Path Builder App
Path Builder App
SVG Path Builder App – Build an SVG path quickly using a GUI.
css2sass
css2sass
css2sass – Web-based app for converting CSS snippets to Syntactically Awesome StyleSheets code.
.resizr
resizr
.resizr – A Simple app for testing your CSS media queries.
See more: HTML5 Cheat Sheet
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