Palladio is an excellent source for researchers. It allows users to create a map or graph that reflects their data. In an activity for one of my courses, I used Palladio to create a graph which depicted data from narrative slave interviews. I believe its great to use Palladio especially if you desire to create a networking map.
To use Palladio, go to http://hdlab.stanford.edu/palladio/
Click start and then load the data you would like to use into the space provided on Palladio. On Palladio you can create maps or graphs and add various features or filters to your map or graph. Overall, Palladio is a great resource for researchers to use. It gives your data visualizations which will help your audience better understand your research.