Punycode.js
A robust Punycode converter that fully complies to RFC 3492 and RFC 5891, and works on nearly all JavaScript platforms.
Sheetrock
Quickly connect to, query, and lazy-load data from Google Spreadsheets.
Canvas Xpress
JavaScript VisualizationTools
Slick Grid
A lightning fast JavaScript grid/spreadsheet
Jszip
Create, read and edit .zip files with Javascript
Alchemy
Alchemy.js is a graph drawing application built in d3.
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.
J Schema
A simple, easy to use data modeling framework for JavaScript
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.
Faye
Simple pub/sub messaging for the web
Tiny Slider
Vanilla javascript slider for all purposes.
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
Dataset
JavaScript library that makes managing the data behind client-side visualisations easy
Aja.js
Ajax without XML : Asynchronous JavaScript and JavaScript/JSON(P)