Books from www.thefutureoflife.com/books.htm
Script for the emailing results of the post-test: http://www.response-o-matic.com
Scripts for matching and cloze practice exercises: http://www.halfbakedsoftware.com/
Other graphics were modified from online images in public the domain by using Photoshop (Thanks to all original owners)
Thanks to Zarghona and Peuan for allowing their photos to be on this site