This node will retrieve the file path for the current logged in user’s appdata. This begins to be useful when analyzing for dependencies.
Python
Workset.Create
Create worksets in Revit via a list of names. (strings)
Source: http://sixtysecondrevit.blogspot.com/2015/06/revit-create-worksets-with-dynamo.html
Get External File References and Details
This node uses Python to access the File Reference details for the currently opened Revit file using the API. It also relies upon another node that uses a Python import to get the System file Date Modified information using the Path gained from the Revit API.
Source: https://twitter.com/lukeyjohnson/status/661019299608264705
Dynamo Nodes 