The following add-ins (formerly referred to as plug-ins) are available to subscription customers for use with Revit software.
Some add-ins must be downloaded from the Autodesk Subscription Center. Other add-ins are included with the Revit software; they are enabled when you log in using your subscription user account.
To download an add-in, visit the Autodesk Subscription Center at http://subscription.autodesk.com.
Autodesk Video: Revit Exchange