Estúdio Livre is the back end of the portal:
http://estudiolivre.org
it uses TikiWiki as a base but enhances it with a lot of personalized code to allow for the use of Ajax interfaces, to
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create a free multimidia archive and to integrate with an icecast streaming server. Polvo is a sub-project that allows for seamless integration with TikiWiki's codebase. [Less]