Chart library for Java

 JFreeChart is a free Java class library for generating charts, including:
   * pie charts (2D and 3D)
   * bar charts (regular and stacked, with an optional 3D effect)
   * line and area charts
   * scatter plots and bubble charts
   * time series, high/low/open/close charts and candle stick charts
   * combination charts
   * Pareto charts
   * Gantt charts
   * wind plots, meter charts and symbol charts
   * wafer map charts