matplotlib is a python 2D plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments across platforms.
command-line driven graphing utility for Linux, Windows and many other platforms
Vis.js is a dynamic, browser based visualization library. The library is designed to be easy to use, to handle large amounts of dynamic data, and to enable manipulation of and interaction with the data.
ggplot2 is a plotting system for R, based on the grammar of graphics, which tries to take the good parts of base and lattice graphics and none of the bad parts.
NVD3.js is an attempt to build re-usable charts and chart components for d3.js without taking away the power that d3.js gives you. This is a very young collection of components, with the goal of keeping these components very customizeable, staying away from your standard cookie cutter solutions.
Flexible, interactive charts for the web. Plottable.js is built on top of D3.js and consists of pluggable set of Components which encapsulate rendering logic, and a layout engine that is responsible for positioning them.
Create interactive charts easily for your web projects. Used by tens of thousands of developers and 61 out of the world's 100 largest companies, Highcharts is the simplest yet most flexible charting API on the market.
Simple, clean and engaging charts for designers and developers