35个提高开发效率的CSS工具
1. CSS Colorguard

   CSS Colorguard helps you maintain the color set that you want, and   warns you when colors you’ve added are too similar to ones that already   exist. Naturally, it’s all configurable to your tastes.
https://github.com/SlexAxton/css-colorguard
2. Bounce.js

   Bounce.js is a tool for generating tasty CSS3 powered keyframe   animations. The JS library for generating dynamic animations is on its   way. Simply add a component, choose the preset. And then you can either   get a short URL or export to CSS.
3. Kouto Swiss

   Kouto swiss is a complete CSS framework for Stylus, inspired by great   tools like nib, compass, bourbon. kouto swiss gives you a lot of mixins,   functions and utilities to code faster, and include the power of   caniuse website to make your stylesheets fits your compatibility needs.
4. ConciseCSS

   Concise is built so that you have a lot of options handed to you out of   the box. It comes built from the ground-up to be mobile friendly and   includes a simple grid system, beautiful typography, and a few other   bells and whistles. However, it is also built super lean, with a little   over 2,000 thousand lines of CSS, and a few hundred lines of JavaScript.   Concise is specifically built to be customized, tinkered with, and   hacked. The whole goal for people using Concise is that they can use the   framework to fuel their own creation. The framework comes with very few   pre-defined styles, so overriding styles is never a hassle.
5. A to Z CSS

   A to Z CSS is a weekly podcast covering a variety of CSS topics. Each   episode is short (generally between 4 and 7 minutes), making them easy   to actually learn from.
6. Cody

   Cody is a free collection of HTML, CSS, and JavaScript snippets for   your website. So far there are snippets for navigation, intros, shopping   carts, and more.
7. Spritebox

   Spritebox is a WYSIWYG tool for creating CSS from sprite images. You can generate sprites, combine spritesheets, and more.
8. Single Element CSS Spinners

   Single Element CSS Spinners is a collection of loading spinners   animated with CSS. Each spinner consists of a single div with a class of   ‘loader’ and content text of ‘Loading…’. The text is for screen readers   and can be used as a fallback state for older browsers.
9. Gridlover

   Gridlover gives you adjustable css for font sizes, line heights and   margins. The default css output is for body, p and h1 – h4 headings, but   you can of course apply your adjusted values to any element by editing   the css.
10. Anijs

   AniJS is a declarative handling library for CSS animations that makes   development quicker and more eloquent. It’s fully documented and easy to   get started with.
11. CSS Shrink

   CSS Shrink makes it simple to shrink your CSS files while keeping the   markup pretty and well-formatted. It has a couple of options for only   removing spaces and comments or for keeping browser-specific markup.
12. Tips

   Tips is a tooltip implementation built entirely with CSS. It triggers tooltips on tap or hover, and is simple to configure.
13. Agile

   Agile CSS3 Engine lets you generate pure CSS3 animations using   JavaScript. It’s easy to use and cross platform compatible. In modern   browsers Agile can generate high-quality, high-end visual effects.   Especially for mobile devices Agile’s performance is perfect,that helps   you build great mobile apps, easy and fast.
14. Lup

   Lup is a lightweight and easy to use library to manage and control CSS3 transition.
15. Jeet

   Jeet is the most advanced, yet intuitive, grid system on the market   today. You can think of it like the spiritual successor to Semantic.gs.   Jeet allows you to express your page grid the same way a human would   describe it. No more needlessly nesting elements. No more rigid twelve   column rules. Enjoy building faster with less code, and more flexibility   with Jeet.
16. StyleStats

   StyleStats makes it easy to collect data about the CSS styles used on   any website. Just enter a URL (you can also upload a file or input the   CSS directly) and StyleStats will parse things like font sizes,   universal selectors, unique colors, and much more.
17. TukTuk

   Tuktuk is a lightweight object-oriented CSS framework for easily   creating responsive and fully extensible websites. It includes layouts   up to twelve columns, as well as forms, buttons, tables, typography, and   more.
18. Pleeease

   Pleeease is a CSS post-processor. The main goal of this tool is to   perform all treatments that a pre-processor shouldn’t have to do! (eg,   dealing with prefixes, convert rem to px, support older browsers, etc.).
19. MotorCortex

   MotorCortex makes web animations easy, providing the ability to   describe them through CSS-like syntax and stop messing animation logic   with your actual javascript code.
20. Enjoy CSS

   With EnjoyCSS, creating instances for hover, active, and custom class   states has never been more simplified than with EnjoyCSS generator. It   is one of the many useful CSS tools which every developer and designer   should have in their toolbox by which to speed up their work-flow.
21. CSS Prism

   CSS Prism lets you enter the URL of any CSS file to view and modify its   color spectrum. It also includes a bookmarklet to view the colors from   any website.
22. Sencha Animator

   It is a desktop application which enables users to create CSS3   animations for touch screen mobile devices and webkit browsers. Sencha   Animator helps users to create animated text, images, design buttons   with gradients and embed analytics.
23. PCSS

   PCSS is a PHP-driven CSS Preprocessor, which aids developer to write   CSS code quickly by defining variables, class nesting, default unit and   server-side browser specifics. PCSS do server-side processing using PHP   5, so it requires this version to be available on the server where the   website is running.
24. CSS Menu Maker

   This tool helps users to create custom CSS drop down menu easily. CSS   Menu Maker provides webmaster with tools to create custom, cross browser   compatible css menus also it provides source code for all CSS Menus and   facilities users to download and tweak the code.
25. PrefixmyCSS

   PrefixMyCss lets you prefix your CSS3 code easily. Users have to paste   CSS code in to the window to prefix, all vendor prefixes are added to   your code, users can safely replace their old code.
26. LayerStyles

   It is a HTML5 app for creating CSS3 in an intuitive way. It has   Colorpicker which lets you pick any color of the element you’re working   on, it facilitates users with Drag and Drop images on to the page to use   them as background or to pick their color.
27. TopCoat

   Topcoat is a library which consists CSS classes for form elements,   buttons, checkboxes, sliders and many more. It is a lightweight tool   that would make your website or app look awesome in short period of   time.
27. Sky CSS Tool

   Sky CSS Tool allows you to create CSS classes almost without using   manuscript code. Users would need JavaScript compatible browser for the   proper functioning.
28. Extract CSS

   extractCSS is a free and web-based application that is capable of   extracting style-related information from HTML. These include ids,   classes + inline styles and the output can be customized too (indent and   brackets usage).
29. CSS Matic

   CSSmatic is a non-profit ultimate CSS tools for web designers. There   are four useful tools at the moment. You can use the Gradient Generator   which supports multiple colors and opacity stops to get amazing   gradients.
30. CSS Lint

   CSS Lint is an exciting open source project which helps finding the   problems and inefficiencies in the CSS code. As expected, it displays   any parsing errors like mis-typed characters which may end-up in   non-rendered rules.
31. Quick Form Builder

   Quick Form Builder allows you to easily create CSS forms.
32. Tridiv

   Tridiv is a free-to-use web application for creating 3D CSS shapes   pretty easily. Using the app, we can insert 4 different shapes (cuboid,   pyramid, cylinder, prism) and resize or rotate them. The editor   interface displays all views (side, front, top) at the same time and it   is possible to use any number of shapes.
33. Spritemapper

   Spritemapper is an application that merges multiple images into one and   generates CSS positioning for the corresponding slices. This tool helps   developers to optimize available space and the loading time.
34. Stylie

   Stylie is a fun tool for easily creating CSS 3 animations. You can   configure your animation graphically, tweak it, grab the generated CSS   and go!
35. Keyframer

   Kyeframer is a handy and useful tool that helps you to create CSS3   animations easily. Using keyframer is quite easy you only need to click   the timeline to add a keyframe, then click the circle button to add your   animation’s CSS, or the X button to delete the current keyframe, and   test your skills.