State of the Union Visualizer
Brad Borevitz created this tool, simply named State of the Union, to visualize keywords from US presidential State of the Union addresses from 1790 to 2006. Every address is included; for each one common words are displayed with the size showing how many times they were used in the speech and the height on the graph showing the word's significance as compared to other speeches. A fascinating look at both the politics and tone of the moment—clicking on the timeline even pulls up all that period's US history entries from Wikipedia.
