From Protege Wiki
This page lists plug-ins that are compatible with the 4.0 version of Protege-OWL. The list is automatically generated from the results of a semantic query. More information about performing semantic queries is available on the main Protege website. This page also provides a link to download Protege-OWL 4.0 in the infobox on the right-hand side, as well as a link to the changelog for this version at the bottom.
For additional information about Protege-OWL 4.0, please refer to the following:
|Last update||June 16, 2009|
List of all plugins compatible with Protege-OWL 4.0.