http://www.vischeck.com/daltonize/runDaltonize.php
http://www.vischeck.com/vischeck/vischeckImage.php
http://www.vischeck.com/vischeck/vischeckURL.php
Other crap:
http://www.snopes.com/photos/photos.asp
http://weblog.herald.com/column/davebarry/archives/cat_productivity_enhancers.html
http://weblog.herald.com/column/davebarry/archives/cat_unfit_for_the_office_unless_you_work_for_the_osbournes.html
http://www.abc.net.au/gameon/chasm/chasmgame.htm