Rdio for XBMC

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Rdio for XBMC allows you to play your Rdio music collection through the XBMC media centre.

10 Usability Heuristics

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The 10 most general principles for user interface design. They are called "heuristics" because they are more in the nature of rules of thumb than specific usability guidelines.

WhatFont Tool

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The easiest way to inspect fonts in webpages. Available as a bookmarklet or as browser extension.

Mozilla Developer Network

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Organized by topics provides documentation about extensions, themes, applications, frameworks and technologies.

Gridlover

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Gridlover is the tool to establish a type system with modular scale and vertical rhythm to build upon.