I was recently directed to the Google Mentalplex, a way of searching for things by projecting mental images into the computer.
It's been around a while, but it's slow, and you have to remove your glasses for it to work, which is probably why it's not more popular.
An original tool suggested by Google! Ty my mind it is a kind of psychological trick! But it makes Google notable for this unusual tool.
It make me think twice about all those searches I do. Not to mention all the stuff I’ve been putting on my facebook.
[Moderator’s note: I have deleted the link to the last word because it appears to be a malware site. -mf]
you may be interested in http://vark.com/