Community driven list of useful things for front end developers. How to contribute?
- Chrome Canary
- Internet Explorer 10
- Opera Next Desktop, Opera Beta Mobile
- WebKit Nightly
- Firefox Nightly, Firefox Aurora
- Firefox:
- Opera:
- Safari
- Chromium:
- Dabblet — interactive playground for quickly testing snippets of CSS and HTML
- JSBin — JavaScript, HTML and CSS playground
- gist.github — code snippets
- JSFiddle — JavaScript, HTML and CSS playground
- CodePen — Another JS, HTML, CSS sandbox
- RegExr — regular expression playground
- PNG compressor
- Tiny png — can make IE6 friendly PNGs
- IMGO — image optimization tool
- SVGO — SVG optimization tool
- JPEG compressor — your photos on a diet
- Smush.it — online image optimization tool
- placehold.it — a quick and simple image placeholder service. By the way placekitten & placeboobs
- lorempixel — placehold random images with dummy text
- SpritePad — Sprite generator
- Favicon generator — draw your favicon
- Grumpicon — tool processes a set of SVG files, generates PNG fallback images for legacy browsers
- XML to JSON
- MicroJS — helps you discover the most compact-but-powerful microframeworks
- JavaScript Beautifier
- JavaScript Patterns Collection
- Learning JavaScript Design Patterns
- TodoMVC — helping you select an MV* framework.
- Backbone.js — give your JS App some Backbone with Models, Views, Collections, and Events.
- Knockout — is a JavaScript MVVM library that makes it easier to create rich, desktop-like user interfaces with JavaScript and HTML.
- Knockback.js — provides Knockout.js magic for Backbone.js Models and Collections.
- AngularJS
- Ember.js
- CanJS
- Spine — lightweight MVC library for building JavaScript applications.
- Batman.js — is a framework for building rich single-page browser applications with CoffeeScript or JavaScript.
- Dojo
- Agility.js — is an MVC library for client-side Javascript that lets you write maintainable code without compromising on development speed. It's write less, do more with maintainability.
- Closure Library is a broad, well-tested, modular, and cross-browser JavaScript library.
- Metro JS - plugin for jQuery which enables the Modern UI interface on the web.
- toastr - simple JavaScript toast notifications.
- HTML5 Rocks
- html5please
- mobilehtml5
- DirtyMarkup - Quick/easy HTML auto formatting
- Template-Engine-Chooser!
- Handlebars
- ICanHaz.js
- Hogan.js — JavaScript templating from Twitter.
- Jade
- EJS
- JUST
- Closure Templates
- ECT — JavaScript template engine with CoffeeScript syntax
- Dust — Asynchronous templates for the browser and node.js
- TwigJS — A port of PHP template engine to JavaScript
- yate — Yet Another Template Engine
- Data URL Toolkit, online service
- css3please — The Cross-Browser CSS3 Rule Generator
- The CSS3 Test — check your browser!
- CSScomb — tool for sorting CSS properties in specific order
- Procssor — CSS Beautifier
- Eric Meyer's reset
- normalize.css
- CSS Gradient finder
- CSS Gradient generator
- Sprite Cow — CSS Sprites
- CSS3 Transitions, Transforms and Animation Tutorial
- Easing animation tool
- Cubic-Bezier
- Easings function
- cssdb.co — Popular CSS Libraries
- Helium — JavaScript tool to scan your site and show unused CSS
- Media Query Builder
- The Responsinator — helps to see responsive site will look on the most popular devices
- Stylie — A fun CSS animation tool
- autoprefixer — Parse CSS and add prefixed properties and values by actual Can I Use database
- Patternify — Draw your own Pattern then just copypaste CSS code
- Screensiz.es - Table of characteristics of popular devices.
- DPI Love - Calculation DPI of devices.
- Less
- CSS to Less
- LESS Elements – a set of useful mixins for the LESS
- lesshat.com – smart LESS mixins
- SASS and SCSS
- CSS to SASS
- Compass
- sassmeister — playground for Sass
- Bourbon — A simple and lightweight mixin library for Sass. Also, neat.
- Stylus
- nib — library for the Stylus, providing robust cross-browser CSS3 mixins
- xCSS — PHP based CSS preprocessor
- Roole — a language that compiles to CSS
- Rework — arbitrary CSS preprocessing library for node.js and the browser
- Twitter bootstrap
- Zurb Foundation
- YUI
- Blueprint CSS
- HTML5 boilerplate — The web’s most popular front-end template
- HTML5 mobile boilerplate — A best practice baseline for your mobile web app
- HTML5 Reset – One more boilerplate
- HTML Email boilerplate
- Initializr — Choose your boilerplate
- 960gs — CSS grids system framework
- The Semantic Grid System
- 1140 CSS Grid
- Fluid 960 Grid System
- Less Framework
- Skeleton
- inuit.css
- baseline
- Frameless grid
- Kube
- Github style guide
- Google style guide
- Harry Roberts' CSS Guidelines
- SMACSS — Scalable and Modular Architecture for CSS
- OOCSS — Object oriented CSS
- BEM — Block Element Modificator
- Pragmatic jQuery Style
- Principles of writing consistent, idiomatic CSS and HTML
- caniuse
- The Toolbox — a collection of the best time-saving apps, tools, and widgets from around the web
- humans.txt
- robots.txt
- Adobe Edge Inspect
- Unicode Emoticons
- Special Characters Easy to Paste
- Entity Conversion Calculator
- ipsum.me
- Schema.org — Most modern microformat documentation supported by Google, Bing, Yandex and Yahoo
- Microformats.org — hcard, hcalendar and etc.
- base64 converter (from computer)
- pasteboard.co — image sharing web app
- Color Scheme Designer - find resonate colors for a great design.
- Windows-8-like animations with CSS3 and jQuery - a demo made by Sara Soueidan about creating a Modern UI design like in Windows 8.
- CSS-Tricks snippets — useful code snippets
- YUI JS, CSS compressor
- CSSO — Cleaver CSS optimizer
- YSlow — Cross-browser plugin for page speed and performance testing
- Google page speed — Page speed measurement tools collection from Google
- Web page test — Check page speed from multiple locations around the globe using real browsers
- jsPerf — JavaScript performance playground
- Google CDN
- Yandex CDN
- Microsoft CDN
- cdnjs — We host it all - JavaScript, CSS, SWF, images, etc
- W3C HTML Validator
- W3C CSS Validator
- CSSLint — static analysis tool for CSS code
- RECSS — A simple and attractive code quality tool for CSS built on top of LESS
- JSLint — The JavaScript Code Quality Tool by Douglas Crockford
- JSHint — community-driven tool to detect errors and potential problems in JavaScript code
- JSCS — JavaScript Code Style checker
- CSSFontStack
- Font Squirrel
- Google WebFonts
- Fontcustom — command line utility to generate fonts from separate svg/eps files
- Fontello — easy way to combine selected icons from popular icons sets into custom made font
- Online Font Converter
- Check font name by screenshot
- ColorSnapper — easy-to-use tool for quickly finding out the color of any pixel on the screen
- Gitbox — version control as easy as Mail
- LiveReload — "As soon as you save a file, it is preprocessed as needed, and the browser is refreshed..."
- PixFit — measure tool
- xScope — for measuring, inspecting & testing on-screen graphics and layouts
- MAMP PRO — Mac, Apache, MySQL and PHP
- DataURLMaker
- ImageOptim — drag'n'drop UI and various optimisation tools
- ImageAlpha — converts 24-bit PNG to paletted 8-bit with full alpha channel
- BLESS CSS — fighting IE's CSS selectors limit, and nice tool for checking CSS selectors count
- Kaleidoscope — a nice diff tool
- Dash — gives you instant offline access to 80+ API documentation sets.