Punycode.js
A robust Punycode converter that fully complies to RFC 3492 and RFC 5891, and works on nearly all JavaScript platforms.
Canvas Xpress
JavaScript VisualizationTools
Alchemy
Alchemy.js is a graph drawing application built in d3.
Slick Grid
A lightning fast JavaScript grid/spreadsheet
Datamaps
Maps for interactive data visualizations in Javascript
C3
A D3-based reusable chart library
Dygraphs
Interactive visualizations of time series using JavaScript and the HTML canvas tag. The dygraphs JavaScript library produces interactive, zoomable charts of time series.
Lowdb
An extendable JSON database for Node and the browser powered by lodash
Flot
Flot is a pure JavaScript plotting library for jQuery, with a focus on simple usage, attractive looks and interactive features.
Convnetjs
Deep Learning in Javascript. Train Convolutional Neural Networks (or ordinary ones) in your browser.
Countable
Countable is a JavaScript function to add live paragraph-, word- and character-counting to an HTML element.
Jszip
Create, read and edit .zip files with Javascript
Jit
The JavaScript InfoVis Toolkit provides tools for creating Interactive Data Visualizations for the Web
Store.js
localStorage wrapper for all browsers without using cookies or flash. Uses localStorage, globalStorage, and userData behavior under the hood
Clusterize.js
Tiny vanilla JS plugin to display large data sets easily
J Schema
A simple, easy to use data modeling framework for JavaScript
Aja.js
Ajax without XML : Asynchronous JavaScript and JavaScript/JSON(P)