The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

jQuery JavaScript Library

Semantic is a UI component framework based around useful principles from natural language.

JavaScript syntax highlighter with language auto-detection and zero dependencies.

A set of small, responsive CSS modules that you can use in every web project.

A bidirectional Markdown to HTML to Markdown converter written in Javascript

a simple zero-configuration command-line http server

A Virtual DOM and diffing algorithm

Lime: Explaining the predictions of any machine learning classifier

JavaScript Vector Library

The Easel Javascript library provides a full, hierarchical display list, a core interaction model, and helper classes to make working with the HTML5 Canvas element much easier.

Multi-Dimensional charting built to work natively with crossfilter rendered with d3.js

A lightning fast JavaScript grid/spreadsheet

Attractive JavaScript charts for jQuery

A highly scalable real-time graphing system

A library for building richly interactive web applications.

JSLint, The JavaScript Code Quality and Coverage Tool

Interactive visualizations of time series using JavaScript and the HTML canvas tag

Feather: fast, interoperable binary data frame storage for Python, R, and more powered by Apache Arrow

A JSON parser and validator with a CLI.

a JavaScript library for reactive documents

Charts for Raphaël

Data Visualization Server

Interactive Scala REPL in a browser

[deprecated] Jupyter CoLaboratory, goto google colab now

JavaScript data utility library.

Emmet Docs & Tutorials

A small, fast, in-browser database engine written in JavaScript.

Boilerplate to create lightweight webapp with Flask & React.js

Implementation of some ideas from ggplot2 on top of d3.js