Lucidity – visual data debugger

I have not seen anything like it either. The idea at the bottom of the page was especially thought provoking for me:

>>Our problem is that we have too much data, too rapidly evolving—and we need ways of automatically eliminating less relevant subsets of that data, retaining only the most essential parts. Lucidity is an attempt to build one of these 'abstractoscopes.'

It is somewhat strange to me that we as programmers have tools to instrument our production systems with metrics, so that they can be monitored and their behaviour understood through visualizations, while at the same time, we use printf and debuggers that show mainly textual information while developing. It is said that a picture is worth more than a thousand words (which describe the same picture).