Here are some most useful tools and resources of CSS3 and HTML5 for web developers.

This article contains CSS3 and HTML5 Resources and Tools that can save some precious time of developers.

CSS LINT

CSS Lint points out problems with your CSS code. It does basic syntax checking as well as applying a set of rules to the code that look for problematic patterns or signs of inefficiency. The [rules] are all pluggable, so you can easily write your own or omit ones you don’t want.

20 Latest CSS3 and HTML5 Resources and Tools for Web Developers 1

normalize.css

Normalize.css is a customisable CSS file that makes browsers render all elements more consistently and in line with modern standards. We researched the differences between default browser styles in order to precisely target only the styles that need normalizing.

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Spritemapper

Spritemapper is an application that merges multiple images into one and generates CSS positioning for the corresponding slices.

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Sprite Cow

Sprite Cow helps you get the background-position, width and height of sprites within a spritesheet as a nice bit of copyable css.

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Patternizer

With Patternizer, it’s easy to make something amazing in just a few minutes. It takes all the work out of creating complicated patterns, letting you focus on creativity and play. Patterns can be saved and shared with anyone, allowing for collaboration and remixing. And you can access them from any device worldwide.

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Prefixr

Prefixr is a web-based tool that gives you cross-browser CSS in seconds. Put in your code, check off a few optional formatting and exclude options, and click the button to get your cross-browser CSS code.

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Patternify

Patternify is a simple CSS pattern generator. Its graphical web-based interface lets you draw the pattern you want, and then it generates the CSS code for you.

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Initializr

Initializr is an HTML5 templates generator to help you getting started with a new project based on HTML5 Boilerplate. It generates for you a clean customizable template with just what you need to start!

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oCanvas

oCanvas is a JavaScript library intended to make development with HTML5 Canvas easier. Instead of working with pixels, you work with objects. It’s very straightforward and easy to get started with. Please have a look at the examples to see just how easy it is.

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Modernizr

Modernizr is an open-source JavaScript library that helps you build the next generation of HTML5 and CSS3-powered websites.

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Response JS

Response JS is a lightweight jQuery plugin that gives web designers tools for building performance-optimized, mobile-first responsive websites. It provides semantic ways to dynamically swap code blocks based on breakpoints and serve images (or other media) progressively via HTML5 data attributes. Its object methodsgive developers hooks for triggering responsive actions and booleans for testing responsive properties.

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Mercury Editor

Mercury is a full featured HTML5 editor. It was built from the ground up to help your team get the most out of content editing in modern browsers.

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Sugar

Sugar is a Javascript library that extends native objects with helpful methods. It is designed to be intuitive, unobtrusive, and let you do more with less code.

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Buzz

Buzz is a small but powerful Javascript library that allows you to easily take advantage of the new HTML5 audio element. It degrades gracefully on non-modern browsers.

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Recurly.js

Secure, PCI Compliant Transaction Forms With Fully Customizable CSS.

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