Automated auditing, performance metrics, and best practices for the web.

Calculate the speed index from devtools performance trace

A proof-of-concept Performance Dashboard, CLI and Node module

Frend — A collection of accessible, modern front-end components.

Magnificent app which corrects your previous console command.

Catch CSS curve balls.

Caniuse command line tool

A CSS workflow for mimicking element queries

Plugin framework for CSS preprocessing in Node.js

Transforming styles with JS plugins

Google App Script for spreadsheet that uses the WPT API to bulk test URLs

An esoteric programming language, come se fosse antani.

Load CSS asynchronously

Highlight lines changed since the last commit (supports Git, SVN, Bazaar, Mercurial and TFS) / ST2(3) plugin

Photoshop plug-in for saving PNG images with pngquant compression

Slip.js — UI library for manipulating lists via swipe and drag gestures

Flatland is a simple theme and accompanying color scheme for Sublime Text 2.

Wraith — A responsive screenshot comparison tool

Unmaintained (see the README): Simple barebones project to show share counts from various social networks.

Mac app to easily upload files to your FTP/SFTP server

Cubism.js: A JavaScript library for time series visualization.

DEPRECATED: Prior to recent developments with the picture element, Foresight.js gaves webpages the ability to tell if the user's device is capable of viewing high-resolution images before the image…

Load images based on network connection speed.

A responsive image polyfill for <picture>, srcset, sizes, and more

CSS 3D renderer for Three.js.

rotate3d manipulation library - lightweight and extensible

A simple light-weight JavaScript library for dealing with touch events

A small library for manipulating the favicon, in particular adding alert bubbles and changing images.

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.

This library adds a new Font() object to the JavaScript toolbox, similar to new Image() for images