Also check his work at https://www.deviantart.com/hopstarter/gallery

Over 5000 high-quality web and vector icons in 77 Icon Sets, and more than 1700 vector graphics for designers and developers.

Sitespeed.io is an open source tool that helps you analyze and optimize your website speed and performance, based on performance best practices. Run it locally or use it in your continous integration. Download or fork it on Github!

Online tools for website performance and scaling

W3C's easy-to-use
markup validation service, based on SGML and XML parsers.

— November 18, 2014 — Performance Budget Metrics Yesterday, Chris Coyier pondered aloud the best metric to use for a performance budget …

Live interactive cross-browser testing in all web browsers - Internet Explorer, Firefox, Chrome, Safari, and Opera.

We've already covered the different techniques you could use to vastly improve the performance of your front-end applications, their page load time, and the perceived [...]

This article aims to cover the performance gains I've attained in the redesign of Pony Foo, deployed last week to production. I'll be covering a few different topics [...]

The year is 2014, a ninja rockstar band goes up against the now long-forgotten progressive enhancement technique, forsaking the origins of the web and everything they [...]

Bonjour à tous,

Auriez-vous un service à me conseiller pour tester un site responsive ?

Merci !

Check Browser Compatibility, Cross Platform Browser Test

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.