TL;DR : Transform complex data into easy visuals with a lifetime license to Microsoft Visio, now only $14.97 (reg. $249.99).

Set visualisation techniques, including Euler diagrams, have become indispensable ... thereby broadening the applicability of these visual tools across fields as diverse as computational biology ...

What he developed provides some nice visualization diagrams of the work item tracking system, which can make work item information easier to comprehend. This project can be downloaded from CodePlex.