jFreeChart

jFreeChart is a free charting solution for Java. See the samples for more details

OK, so we haven't included any jFreeChart generated reporters so that we could reduce the dependencies and size of download - but it is well worth a mention if you really want your charts to shine.

jFreeChart would add another 7.4Mb for the dependencies and takes a little more time to configure and integrate.

Who knows, if we have time and there is a need, we will add some examples.