Autodesk Revit Activity Stream
The 10.1 version of Autodesk Revit Activity Stream is available as a free download on our website. The following version: 10.1 is the most frequently downloaded one by the program users. Autodesk Revit Activity Stream relates to Photo & Graphics Tools. The actual developer of the free program is Autodesk.
From the developer:
The Revit Activity Stream app connects Revit to Bluestreak cloud services to help distributed teams more effectively collaborate as they work on one model. This Bluestreak app combines automated notifications of Revit worksharing events with informal team comments so team members can communicate when models are saved to central to ensure efficient hand-offs.
You may want to check out more software, such as Autodesk Revit Architecture 2011, eTransmit for Autodesk Revit or Autodesk Revit Architecture, which might be related to Autodesk Revit Activity Stream.