- Bootstrap
- HTML5 Boilerplate
- Foundation
- Web Starter Kit
- UI Kit
- Semantic UI
- Sierra
- SuitCSS
- Miligram - A minimalist CSS framework.
- Skeleton
- Juiced – Flexbox CSS framework.
- PureCSS- A set of small, responsive CSS modules that you can use in every web project
- PrimerCSS – The CSS toolkit and guidelines that power GitHub.
- Neutron – Sass framework for creating flexible, clear, and semantic web layouts.
- Basscss – Lightweight collection of base element styles and immutable utilities.
- Rin – Lean, gulp-based HTML and SASS boilerplate for better front-end coding.
- Wee – Lightweight front-end framework for logically building complex, responsive web projects.
- Scooter – SCSS framework & UI library from Dropbox.
- SpaceBase – Sass-based responsive CSS framework.
- Decorator – HTML, CSS, and JavaScript front-end framework.
- Rebar – A Sass/Stylus grid framework.
- Concise CSS – Framework written in SASS that’s lightwheight and easy-to-use.
- Workbench – Frontend boilerplate build for faster development.
- Material – HTML5 UI framework based on Material Design.
- Materialize - A modern responsive front-end framework based on Material Design
- LumX – Framework based on AngularJS & Material Design specs.
- MUI – Lightweight Material Design web framework.
- BlazeCSS – Open source modular CSS framework providing great structure for building websites quickly.
- Vital - A minimally invasive CSS framework for modern web applications
- MinCSS - The 995 byte CSS framework
- Kube - a CSS framework for professional designers and developers
- Furtive - A forward-thinking, CSS micro-framework
- Fox CSS - A light CSS framework
- Siimple - A set of small, responsive CSS modules that you can use in every web project
- Lotus - a small (~1.8k) and powerful css library for the responsive web
- Picnicss - Lightweight and beautiful library
- Simple Grid - a CSS grid for your website
- Flexbox grid - A grid system based on the flex display property.
- Wing - Minimal CSS Framework
- HackCSS - Dead simple css framework
- https://github.com/automattic/_s
- https://github.com/CherryFramework/cherryframework4
- https://github.com/milohuang/reverie
- http://runwaywp.com/
- http://gantry.org/
- http://vafpress.com/vafpress-framework/
- https://github.com/justintadlock/hybrid-core
- http://my.studiopress.com/themes/genesis/
- BEM
- Hyphenated BEM
- SMACSS
- Atomic Design
- OOCSS
- KISS
- Naming Conventions - SuitCSS
- rscss
- Modular CSS Naming Conventions - The Sass Way
- CSS Guidelines by Harry Roberts
- Idiomatic CSS by Necolas
- CodeGuide by mdo
- Sass Guidelines by Hugo Giraudel
- Google HTML/CSS StyleGuide
- Wordpress Coding Standars
- ThinkUP
- PrimerCSS - The CSS toolkit and guidelines that power GitHub.
- CSS Styleguide by CSS Tricks
- Sass Styleguide by CSS Tricks
- MaintainableCSS
- CSS Gradient Animator – Web-based tool for generating animated gradients.
- Blend – Tool for generating simple and beautiful CSS3 gradients.
- .resizr – Simple app for testing your CSS media queries.
- CSS Ruler – Handy web-based tool for exploring CSS lengths.
- CSS Stats - Visualize useful stats about CSS files
- Purify CSS - Remove unused CSS. Also works with single-page apps.
- SVGOMG – Web-based app for optimizing and configuring SVGO.
- SVG Path Builder App – Build an SVG path quickly using a GUI.
- css2sass – Web-based app for converting CSS snippets to Syntactically Awesome StyleSheets code.
Pagekit.com
- CSSGram – Tiny library for recreating Instagram filters with CSS.
- Flickity – CSS library that makes galleries & sliders feel lively and effortless.
- Pushy – Responsive off-canvas navigation menu using CSS transforms & transitions.
- Rucksack – A little bag of CSS superpowers.
- Drop – Library for creating dropdowns and other floating elements.
- Gradify – Module for producing CSS gradients as placeholders for images.
- SassyFlags – Simple library for adding flags to your websites.
- Flag-icon-css - A collection of all country flags in SVG
- Imagehover.css - Pure CSS Image Hover Effect Library
- Browser Diet - How to lose weight in the browser
- UI Iteractions - The best UI Interactions for your inspiration, every day.
- UIDB- Specific examples of UI from around the web
- Tuesday – Quirky CSS animation library.
- MotionUI - A Sass library for creating flexible CSS transitions and animations.
- Animate Plus – JavaScript library that helps you animate CSS properties and SVG attributes.
- Rocket – Simple tool for creating web animations.
- Shift – Simple framework to build timed, contained CSS animations.
- Transformicons - Animated icons, symbols and buttons using SVG and CSS
- iconate.js – Tiny performant library for cross-browser icon transformation animations.
- Dynamics.js – Javascript library for creating physics-based CSS animations.
- mo.js – The ‘Motion Graphics Toolbelt’ for the web.
- cta.js – Navigation in tile based apps
- ramjet.jss – Library that morphs DOM elements from one state to another with smooth transitions.
- Animsition – Simple jQuery plugin for CSS animated page transitions.
- vivus.js – Lightweight JavaScript class that allows you to animate SVGs.
- Magic animations
- Clusterize.js – Tiny vanilla JS plugin to display large data sets easily.
- Ploty.js – High-level, declarative, open-source charting library.
- Textures.js – Set of SVG elements for data visualization.
- Charts JS - Simple yet flexible JavaScript charting for designers & developers
- Elevator.js – "Back to Top" button that behaves like a real elevator.
- Slideout.js – Touch slideout navigation menu for your mobile web apps.
- Hammer.js – Javascript library for multi-touch gestures.
- Responsible.js – Give mobile visitors the option of viewing either the desktop or mobile layout.
- FullPage.js - Create Beautiful Fullscreen Scrolling Websites
- IntemSlide.js – Simple JavaScript touch carousel with support for touch swiping & mousewheel scrolling.
- Lory.js – Touch-enabled minimalistic slider written in vanilla JavaScript.
- Simple Lightbox – Touch-friendly image lightbox for mobile and desktop with jQuery.
- Chocolat.js – Responsive jQuery lightbox plugin.
- jQuery lightgallery – Lightweight, customizable, modular, responsive, lightbox gallery plugin.
- Bricklayer.js - Build Pinterest-like cascading grids
- Bideo - A JS library that makes it super easy to add fullscreen background videos.
- Tringalify - algorithmically generated triangle art
- Particles.js A lightweight JavaScript library for creating particles
- Adaptative Backgrounds - A jQuery plugin for extracting dominant colors from images and applying it to its parent.
- Rimg – Pure JS responsive image solution for browsers that support mediaqueries.
- Responsify.js – jQuery plugin that makes images truly responsive.
- PixelFLow – An image pixelating filter jQuery plugin using canvas.
- Smartcrop.js – Content aware image cropping.
- Image Blur Plugin – Ultra-light cross browser image blurring plugin for jQuery.
- Layzr.js – Small, fast, modern, and dependency-free library for lazy loading.
- AntiModerate – Progressive image loading library.
- Awesomeplete – Ultra-lightweight, highly customizable and simple autocomplete jQuery plugin.
- Instantsearch.js – Library of widgets designed for high-performance instant search.
- Notie.js – Clean and simple notification plugin.
- Flatpickr - A lightweight & powerful datetimepicker
- tota11y – An accessibility visualization toolkit.
- ally.js – JavaScript library to help make accessibility simpler.
- emojify.js – Javascript module to convert Emoji keywords to images.
- gridstack.js – jQuery plugin for widget layouts.
- Roll – JS library to help you keep track of position, scrolling, and pagination.
- Rune.js – JS library for programming graphic design systems with SVG in the browser.
- Clipboard.js – Modern approach to copy text to clipboard.
- html5tooltips.js – Light and clean tooltip library with CSS3 animation.
- Challenger.js – Drop-in JS library that adds interactive programming pop-up challenges to any page.
- egg.js – Simple javascript library to add easter eggs to web pages.
- Annotator.js – Plugin for highlighting, sharing, adding notes and tags to any selected text on a page.
- Select2 - The jQuery replacement for select boxes
- Tribute.js - Native ES6 JavaScript @mention Plugin
- Styleguide - Living Styleguide Made Easys
- Embed.js - A pure JavaScript plugin to insert or embed
- ZingTouch - A JavaScript gesture detection library for the modern web
- D3 - Bring data to life with SVG, Canvas and HTML.
- GeoJSON - GeoJSON is a format for encoding a variety of geographic data structures.
- TopoJSON - an extension of GeoJSON that encodes topology.
- GeoJSON.io - a quick, simple tool for creating, viewing, and sharing maps
- MapSVG - The ultimate WordPress mapping solution
- Spam - A D3 library to create maps with Canvas
- Push.js - A compact, cross-browser solution for using the JavaScript Notifications API
- Vanilla List - The Vanilla Javascript Repository
- FlatMarket - Flatmarket is a free, open source e-commerce platform for static websites.
- https://dribbble.com/shots/2715392-40-Gesture-Icons
- http://speckyboy.com/2015/12/21/top-50-free-icon-sets-2015/
- https://speckyboy.com/2016/05/18/free-barista-coffee-lover-flat-line-icon-set/
- FlexBugs - A community-curated list of flexbox issues and cross-browser workarounds for them
- ThinkWithGoogle - Test how mobile-friendly your site is
- The A11Y Project - A community-driven effort to make web accessibility easier.