Data Science: Data Visualization

R is great for statistical computing and graphics (see especially the ggplot2 and lattice packages). And it's open source.

Tagxedo turns words - famous speeches, news articles, blog posts or tweets -- into a word cloud

A listing of visualization resources.

Aims to provide a platform for scientists from mathematics, computer science, physics, chemistry, environmental sciences, biosciences, and engineering willing to cooperate in solving challenging scientific and technological problems.