This tool visualizes the sourcecode of Mozilla 1.7. It displays metrics like lines of code, number of functions, etc. The code can be explored in 3D-space using a 3-button mouse with scroll wheel.
Project ASSIST at Design Rationale Paper: http://rationale.csail.mit.edu/publications/Sezgin2006Sketch.pdf Update: randform review and thoughts on ASSIST
I posted an updated tech demo of RhNav - Rhizome Navigation visualizing user behavior of this blog. The graph is now centered around the page where most time is spent. Noise created by search engine robots is filtered which should clear things up quite a
S. Charfi, E. Dubois, and R. Bastide. Task Models and Diagrams for User Interface Design, volume 4849 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2007)
T. Schlegel. Proceedings of the 5th International Workshop on Model Driven Development of Advanced User Interfaces, ACM Conference on Human Factors in Computing Systems, (2010)