Revit Extensions for Autodesk Revit 2013

If you are a subscription customer, check out the new "Revit Extensions for Autodesk Revit 2013" under the "Product Enhancements" section of the subscription website.

There are quite a few nice features; especially if you are a Revit Structure user.

From the website:
"Revit® Extensions for Autodesk® Revit® 2013 extend the capabilities of Autodesk® Revit® 2013, Autodesk® Revit® Architecture 2013, Autodesk® Revit® MEP 2013, and Autodesk® Revit® Structure 2013 software in key areas, including structural analysis, modeling, reinforcement, interoperability and construction documentation. This download contains all previously released Revit Extensions and updates. The Q3 Update includes enhancements to bridge modeling, integration with Autodesk® Robot™ Structural Analysis Professional 2013, and improvements to the reinforcement extensions. Refer to the “Feature Summary” for details."