Atul Khanzode, Flash, Lee Miller & Tau
The STL Export for Revit is designed to produce STL files of your building.
IFC Exporter for Revit
This is the .NET code used by the Revit 2012 family of products.
Create complex 3D animations and environments using specialized tools.
ADA3D STL Viewer is a free program that helps you visualize STL or OBJ meshes.
Maxwell Render offers seamless integration with 17 3D/CAD apps.
This extension provides import/export functionality for STL files to SketchUp.
Currently it works for 3dsmax 2010/2011/2012 but I plan to support Maya too.
STL2CAD 2007 - Import STL is an AutoCAD application to import STL files.
STL4CAD 2007 - Export STL is an AutoCAD application to export to STL file.
Use Discover.STL to view STL files for any faceting issues.
The Maya Cg Plug-in allows artists to author and visualize content in Maya.
PES 2012 EURO DLC Patch is a great and interactive patch for PES 2012.
MiniMagics is an STL Viewer and Communication Tool.
It enables Maya users to easily and quickly rig a wide variety of CG characters.
Solid Concepts, Inc.
View, Measure and Modify STL, SLDPRT, SLDASM, VRML, SVD and SFX formats.
AdvancedSkeleton is a collection of Maya tools for doing character setup.