OntoWiki

OntoWiki is a Semantic Data Wiki as well as an Application Framework providing support for agile, distributed knowledge engineering scenarios.
OntoWiki is developed by the AKSW Research Group http://aksw.org in Leipzig.

OntoWiki http://ontowiki.net has basic support for WebID via an external ID service (e.g. https://foafssl.org/srv/idp)

Download from http://code.google.com/p/ontowiki/.

Under the covers OntoWiki uses the Zend framework. The following articles were helpful for getting OntoWiki to work behind a proxy server.