D3.js – JavaScript based data visualization library
NVD3 – Re-usable charts for d3.js
Arbor.js – jQuery graph visualization library
Cubism.js – a d3.js plugin for visualizing time series
Dance – A simple data-driven visualization framework based on Data.js and Underscore.js
Envision – A Javascript library for creating fast, dynamic and interactive time series visualizations
Sigma.js – Javascript library to display interactively static and dynamic graphs
Flot – JQuery library for for line graphs and bar charts
Amcharts – JavaScript charting library
Highcharts – charting library written in pure HTML5/JavaScript, offering intuitive, interactive charts to your web site or web application
Raw – Raw is an open web app to create custom vector-based visualizations on top of the amazing D3.js library through a simple interface. – NOT INTERACTIVE
Vis.js – Javascript visualization library
dimple – An object-oriented API for analytics powered by d3. It aims to give a gentle learning curve and minimal code to achieve something productive
Chartist.js – Open Source JS Library For Responsive Charts
Dygraphs – dygraphs is a fast, flexible open source JavaScript charting library
Google Charts – A collection of simple to use, customizable and free to use interactive charts and data tools
Flourish – plug and play tool for making interactive data visualizations
GraphCommons – collaborative platform for mapping, analyzing and publishing data-networks
Voyant – open source text analysis tool