Document contrast diagram
Document contrast diagrams use the familiar bubble technique and effective use of colour to contrast topic usage in two bodies of text. Gives a visual summary of the content of two text documents that illustrates shared words, words that are unique to one document or the other, word frequency, relative size of the two documents, distribution of emotional tone within the documents, related words based on co-occurrence, and the most common word in each document segment. This example is the 2007 and 2008 US State of the Union (SOTU) Addresses.
This chart shows a comparison between the level of capitalisation at two time points.
Interactive bubble chart
From the website: "This image is a “balloon race”. The higher a bubble, the greater the evidence for its effectiveness. But the supplements are only effective for the conditions listed inside the bubble".
World Bank Data Visualizer
The World Bank has created a complex visualisation tool to make available 49 indicators for 209 countries and 18 aggregates from 1960-2007. Data includes social, economic, financial, information & technology, and environmental indicators. The visualisation is completely customizable bubble chart in the spirit of 'gapminder' and the user selects the x and y axis dimensions as well as the variable that determine the size of the bubbles and the time point to be displayed.