Data Visualization

ArcGIS Online is a Complete, Cloud-Based Mapping Platform

Allows users to contextualize location data by placing data over maps.

DataBasic is a suite of easy-to-use web tools for beginners that introduce concepts of working with data.

Visualize and interact with your data using a simple, yet powerful, user interface.

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.

Easy-to-use online mapping with data on demographics, real estate, health, jobs and more in communities across the US.

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]

Tableau offers a free application, Tableau Public with similar capabilities to the pay version.

Blog post with list of useful Twitter visualization tools.

"A content and concept mapping application," VUE, from Tufts University, allows for the creation of visual information in a flexible environment.

Walrus allows users to see graphs in 3-D. (Source coding is available for those who wish to alter the original program's function.)

WorldMap allows users to create unique data visualizations by overlaying data onto maps.

"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."

List of 20 libraries with data visualization script.