According to it's descriptions, "Fusion Tables is an experimental data visualization web application to gather, visualize, and share data tables." Google is no longer developing this product, but it is still active and available.
Interactive tools to easily create and share maps, presentations and tables, or compare and analyse data and discover amazing facts. [Has both free and paid features]
"Prefuse is a set of software tools for creating rich interactive data visualizations in the Java programming language. Prefuse supports a rich set of features for data modeling, visualization, and interaction."