JFreeChart is an open-source framework for the programming language Java, which allows the creation of a wide variety of both interactive and non-interactive charts.
JFreeChart supports a number of various charts, including combined charts:
It is possible to place various markers and annotations on the plot.
JFreeChart also works with GNU Classpath, a free software implementation of the standard class library for the Java programming language.
JFreeChart automatically draws the axis scales and legends. Charts in GUI automatically get the capability to zoom in with mouse and change some settings through local menu. The existing charts can be easily updated through the listeners that the library has on its data collections.
Eastwood Charts is an open source implementation of the David Gilbert.