Unlike other Grasshopper Revit Links this one supports multiple programs, no further files are created and the configuration is very easy. Assemble your BIM Model in GH with simple BIM elements. A Send component serializes the BIM elements and sends them via TCP/IP to localhost or a remote Revit/ACA instance where the Model is assembled automatically. The Revit/ACA Model can also be updated according to geometry changes in Grasshopper.
Grevit is free for use and requires a current Rhino and Grasshopper version and Revit 2014 UR1 or AutoCad Architecture 2013.
For more information, see the Grevit website.
Further reading: Grasshopper-related add-ins.