www.jfree.org

This may also be of interest: 4D BubbleChart with JFreeChart
http://www.plainagile.com/archives/215

Kind regards,
Alexander

I am very much looking forward to the map display and the proportionally scaled x and y axes that were previously discussed in other posts. Any chance that some of those features will make it into the next release? (That might keep me from gathering all those patches and extensions that were offered...