I use Ideate's Explorer frequently. It is a great supplement to the Revit Filter tool.
Finding orphaned DWG's is worth the price of admission alone.
The Ideate Explorer for Revit® tool gives you an easy, intuitive and profound way to search, filter, quantify and select elements in a Revit model. When having the ability to tie up inter-relationships between 100,000+ building elements can make or break your workday, you need one simple, powerful Revit add-on to help you explore and manage your Revit building information model. Ideate Explorer for Revit from Ideate, Inc. empowers you to: Discover that you have 101 instances of the same DWG imbedded and yet invisible in your Revit file Clean-up rogue line styles Organize and review your items by workset Easily browse, find, and edit instances of revisions, grids, reference planes, color fills, annotation, and other items not covered within the project browser Audit your Revit models and keep them trouble-free
This App is a Plugin for: Revit