http://www.halfbakery.com/

The HalfBakery is an OnlineInnovationRepository.

The Halfbakery is a communal database of original, fictitious inventions, edited by its users. It was created by people who like to speculate, both as a form of satire and as a form of creative expression. http://www.halfbakery.com/editorial/about.html

It uses a ModerationSystem. HalfBakery users can give one positive or one negative vote for each idea submitted. The scores are then summed, compared to the sums of other ideas, and than normalized into a range between 2.5 and -2.5.