The standard NGINX Plus package contains just the NGINX-authored modules from the official open source build and the NGINX Plus extensions. Third-party modules, however, can be dynamically loaded into a running NGINX Plus instance. We build and maintain the most widely used third party modules, a full list of these modules is available here.
Custom or third-party modules not in the list above can also be loaded dynamically into a running NGINX Plus instance. For more details on how to do this, please see this blog post.