A free, open-source developer workspace. Snippets, notes, HTTP requests, calculations, and dev tools in one local-first app.

A modified web browser that helps in responsive web development. A web developer's must have dev-tool.

Adjust the layout of an HTML element based on its width

The only script in your HEAD.

starting html/css template. so much goodness baked in by default (previously named frontend pro template)

A professional front-end template for building fast, robust, and adaptable web apps or sites.

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