JFreeChart is a free Java class library for generating charts (GNU LGPL). Support is included for: pie charts, bar charts, line charts, scatter plots, time series charts, candlestick charts, high-low-open-close charts and more. Use in applications, servlets, JSP or applets. Export to PNG, JPEG, PDF, SVG and HTML image maps. Complete source code is included, subject to the GNU LGPL.

• JFreeReport 0.7.5
  JFreeReport is a free Java class library for generating reports (GNU LGPL). Includes support for headers, footers, grouping, report functions, print preview, export to PDF and...

• EasyCharts 4.0.2
  EasyCharts is a complete library of java chart components, chart applets, and chart servlets that enable programmers to add charts and graphs in java applications, web applications, and web pages with just a few lines of code

• J4L-Chart for Ruby 2.1
  Charting package for Ruby and ruby on rails. It supports more than 18 different chart types and combinations of them like piecharts, linecharts, barcharts, radarcharts, 2D, 3D, open/close charts, bubble charts, scatter charts, curves, candlesticks ...

• ElegantJ Chart Library 2.0
  ElegantJ Charts is a Java Beans Charts & Gauges library for powerful visualization of the data