HTML - CSS - Javascript

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JSON Formatter & Validator

Writing LESS is cool and lightning fast if you compare it to good old CSS and besides, it trains your thinking in solving functional problems. So far so good, but in the end the web needs a CSS file to show your website as it is.

SimpLESS - Your LESS CSS Compiler

LESS « The Dynamic Stylesheet language

JavaScript Architecture: Backbone.js Events

Updated Aug 11, 2012 to reflect current library versions.

http://coding.smashingmagazine.com/2009/07/27/the-definitive-guide-to-using-negative-margins/

The Definitive Guide to Using Negative Margins - Smashing Coding

Since the recommendation of CSS2 back in 1998, the use of tables has slowly faded into the background and into the history books.

http://code.google.com/p/google-styleguide/

Every major open-source project has its own style guide: a set of conventions (sometimes arbitrary) about how to write code for that project. It is much easier to understand a large codebase when all the code in it is in a consistent style. “Style” covers a lot of ground, from “use camelCase for variable names” to “never use global variables” to “never use exceptions.”

styleguide - Style guides for Google-originated open-source projects

Paul Irish

ajax.googleapis.com/ajax/libs/jquery/1/jquery.js

https://developer.mozilla.org/en-US/docs/CSS

CSS

Cascading Style Sheets , most of the time abbreviated in CSS , is a stylesheet language used to describe the presentation of a document written in HTML or XML (including various XML languages like SVG or XHTML ) .