The Subversion Statistics Sifter was developed over 12 months by 12 students as a part of their software engineering studies.
The tool is able to extract data from Open Source Software systems and represents it visually. A user can interactively browse the large amount of data even on source code level. The tool allows the analysis of source code artifacts as well as the behavior of software developers.
If you are interested in our visualization tool please write an email to Christoph Müller and/or read our ISVC 2010 paper.