首先Prefuse是一个，只是目前它的manual还没有建立完全，此外Prefuse的作者很无私，在FAQ里面列举了几个可视化工具，他能看得上眼的，自然应该还不错。

• Piccolo - A Java toolkit for structured 2D graphics using a scenegraph abstraction.
• Processing - A graphics library and IDE serving as an artist's digital sketchbook.
• The Visualization Toolkit (VTK) - A 3D graphics and visualization toolkit.
• JUNG - A Java graph processing and visualization library.
• The InfoVis Toolkit - A Java toolkit supporting a number of visualization techniques.
• Improvise - An application for end-user authoring of interactive visualizations.