If you need to layout a graph in Java, these might help:
- yed Free version of a once commercial framework
- prefuse.org very slick transitions; you will want to use Java 6
- jung great demos, doesn’t look as slick as prefuse but might be more powerful.
- gvf Just the basics, probably dead, too.
- JGraph – commercial, thanks to David@jgraph.com.
There is also a collection of algorithms for graphs: JGraphT It uses JGraph as the default UI library but you can use the algorithms without that.