You can export from Revit MEP and AutoCAD MEP to GRAPHISOFT ArchiCAD.
You can export a 3D view from Autodesk Revit to a Piranesi EPix file.
This add-in can export a Revit analytical model into FEM-Design .struxml format.
An add-in to connect Autodesk Revit and Unity gaming development platform.
ScenicReflections.com/Bit Wise Publishing
Butterfly Woods 3D Screensaver shows a forest full of butterflies and trees.
Design 2D and 3D models for architectural design or structural engineering.
Wood Lake Screensaver is a screensaver showing a valley with an animated lake.
You can generate timber structure for walls and roofs in Autodesk Revit.
MWF Professional for Revit. This comprehensive Metal and wood framing.
You can quickly manage and renumber walls in Revit projects.
SI Tools for Revit Structure is a Revit Structure add-in.
IMAGINiT Utilities for Revit is a pack with add-ins for Revit 2016.
The Graphisoft ArchiCAD Connection is a an add-in for Autodesk Revit programs.
Case Design, Inc.
It enables you to install and update all Revit add-ons.
It is a free add-in that runs inside all versions of Autodesk Revit 2014.
It is a free add-on that allows you to export your models from Autodesk Revit.
This is an add-in for Revit that exports Spaces along with Light fixtures.
StrucSoft Solutions Ltd.
Web Stiffener allows to add web stiffeners to W-beams in Autodesk Revit.