Simple.css simplecss.org

System.css sakofchit.github.io

Responsive Boilerplate responsivebp.com

Pico.css picocss.com

Picnic CSS picnicss.com

PatternFly patternfly.org

sakura oxal.org

Open Props open-props.style

NES.css nostalgic-css.github.io

Materialize materializecss.github.io

Material Components Web material.io

7.css khang-nd.github.io

HiQ jonathanharrell.github.io

minireset.css jgthms.com

98.css jdan.github.io

Foundation get.foundation

Fomantic-UI fomantic-ui.com

Tufte CSS edwardtufte.github.io

U.S. Web Design System designsystem.digital.gov

sanitize.css csstools.github.io

Concise CSS concisecss.com

Cirrus cirrus-ui.netlify.app

XP.css botoxparty.github.io

Bojler bojler.slicejack.com

Blaze UI blazeui.com

Beer CSS beercss.com

MVP.css andybrewer.github.io

Architecting Scalable CSS vimeo.com

Thinking Beyond "Scalable CSS" thedotpost.com

Managing CSS Projects with ITCSS speakerdeck.com

More Meaningful CSS snook.ca

Challenging CSS Best Practices smashingmagazine.com

An Introduction to Object Oriented CSS (OOCSS) smashingmagazine.com

Scalable and Modular Architecture for CSS smacss.com

Side Effects in CSS philipwalton.com

CSS Architecture philipwalton.com

Used and Abused -- CSS Inheritance and Our Misuse of the Cascade phase2technology.com

Multilayer CSS operatino.github.io

About HTML semantics and frontend architecture nicolasgallagher.com

CSS and Scalability mrmrs.io

Bootstrap mdo.github.io

Google google.github.io

CSS Modules glenmaddern.com

SUIT github.com

SUIT CSS Documentation github.com

Object Oriented CSS Wiki github.com

8 rules for a robust, scalable CSS architecture github.com

CSS module system in Google+ github.com

Medium gist.github.com

CSS Is a Mess vimeo.com

Jonathan Snook, Beyond Tellerand 53:49