This is the URL to main site, though it is in German: http://www.imapping.info/

note: site is in german, but the software is in English, too. Note: for those unfamiliar wanting to view this page in another language, you can use online translation such as google translate...

This is a page explaining about the software in English: http://semanticweb.org/wiki/IMapping

And here is a demo of a PDF explaining about the program. I believe it is exported from iMapping, itself:
just zoom in to see the details of the smaller areas of the PDF.

http://swui.semanticweb.org/swui06/posters/Haller/HallerPoster.pdf