RefViz is a visualization tool from Thomson Researchsoft (who also publish EndNote and ProCite). RefViz lets you visualize “galaxies” of bibliographic references showing clusters of references by keywords. It also has a matrix view where you can see how keywords correlate.
Save time and learn more about what is happening in the literature with RefViz. With this powerful text analysis and visualization software program, you get an intuitive framework for exploring reference collections based on content. (From the Product Info page.)