- Prefuse (http://prefuse.org/)
- JUNG (http://jung.sourceforge.net/)
- JUNG is designed for graphs, while Prefuse is designed for many different types of data (which include graphs).
- JUNG has graph operations and algorithms that Prefuse doesn't have
- JUNG seems to be better documented
- JUNG seems to be more scalable
- Examples from Prefuse seem to be more pretty
- Prefuse provides nice interactivity and cool animations