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CivicSpace: CivicSpace is a free open-source software platform for grassroots organizing and civic activity.
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http://rangevoting.org/ – each vote consists of one numerical score from 0 to 99 awarded to each candidate and the candidate with the highest average numeric score wins (simplified description, see original web site for a more complete one).
Google Moderator: A kind of question/answer system when people can vote on questions they find interesting.