Java News from Tuesday, April 21, 2009 has released JFreeChart 1.0.13. According to David Gilbert, This release "contains major enhancements including mouse wheel zooming, panning, clipboard support, improved renderer support for series visibility flags, better performance for rendering of large time series datasets, improved mouse click support, additional support for heat map generation, various minor feature updates, and a good number of bug fixes". JFreeChart is free software under the terms of the GNU Lesser General Public Licence (LGPL), and requires Java 1.3.1 or later.