"Circos", created by Martin Krzywinski, can be used to create concise, explanatory, unique and print-ready visualizations of your genomics data. Circos is designed for visualizing genomic data such as alignments, conservation, and generalized 2D data, such as line, scatter, heatmap and histogram plots. Circos is very flexible — you can use it to visualize any kind of data, not just genomics. Circos has been used to visualize customer flow in the auto industry, volume of courier shipments, database schemas, and presidential debates. It is open source.

http://mkweb.bcgsc.ca/circos/