Ohloh

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Different

Wiki Matrix

Compare them at http://www.wikimatrix.org/compare/Tiki-Wiki-CMS-Groupware+TWiki

Active contributors

Number of contributors who made changes to the project source code each month.
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Tiki is in red

Activity level

Number of commits made to the project source code each month.
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Tiki is in red

Opinions

"..All in all. I was up with TikiWiki in no timeā€¦
To my surprise, it looked more refined than Twiki, the UI was more intuitive, not cluttered. Finding and setting up information was easy..."
-- http://xmltech.wordpress.com/2008/11/11/stint-with-a-cms-twiki-installations-and-problems/

There is a fork of Twiki called FosWiki.

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