JFreeChart (version 0.8.1) is an open-source Java class library for generating the following charts: pie charts; line charts and horizontal/vertical bar charts (regular and stacked, with optional 3D-effect); XY plots and scatter plots; time series, high/low/open/close charts and candle stick charts; combination charts; wind plots, meter charts and symbol charts; JFreeChart includes many features: tooltips, zooming, printing and saving (PNG/JPEG/SVG); access data from any source that supports the defined interfaces (a similar mechanism to Swing's JTable); use JFreeChart in Java servlets, applets or client applications; complete source code included, under the terms of the GNU Lesser General Public Licence; based on the Java 2D API, requires JDK 1.3 or later; comprehensive documentation is available in Acrobat PDF format.