A Catalog Release is a release of a project that has gone through OpenNTF's clearance process. This means that it has been successfully scanned for intellectual property issues, and that they are "install friendly".
If you already have an existing project and feel that it is ready to be included in the OpenNTF Apache or GPL Catalogs you will need to send a mail to IP-Manager at openntf.org.
Learn more about the catalog.