OntoWorld.org
OntoWorld provides a large set of Semantic Web related ressources, such as prominent research groups, tools, publications, ... Due its collaboration with other Semantic Portals (ONTHOLOGY.org and OntoWare.org) the interconnected portal OntoWorld provides a new Ontology Review Mechanism to allow users to rate exitsing ontologies and to comment on them.
The link address is: http://www.ontoworld.org