The week of 8/14/2016 didn’t see any new Revit-related add-ins released on the Autodesk App Store. However, 15 add-ins were updated, including several from Autodesk and a few from SOFiSTiK, among others.
STL Exporter 2017
The STL Exporter is designed to produce a stereolithography file (STL) of your building model | Free
About This Version: Version 2017.0, 8/19/2016
STL Exporter for Autodesk® Revit® 2017