Indiana University has posted a huge list of InfoVis software, libraries, and algorithms that are all freely available.

This page provides pointers to commonly used data analysis and visualization algorithms. An ‘IVC Software Framework’ was implemented to facilitate the easy integration of diverse software packages and their menu driven usage. Many software packages are available in Java and hence can be run on any platform that supports Java 1.4.

via InfoVis CyberInfrastructure- Software.