Autodesk Building Systems 2007
There was a download of Autodesk Building Systems 2007 5.0.297 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The program's installer file is commonly found as acad.exe. We recommend checking the downloaded files with any free antivirus. The most popular version among the program users is 5.0. The program lies within Photo & Graphics Tools, more precisely 3D Design. This free software is a product of Autodesk.
From the developer:
The Autodesk Building Systems Object Enabler 2007 makes Autodesk Building Systems 2007 objects come to life in AutoCAD 2007, AutoCAD Map 2007, and Autodesk Architectural Desktop 2007.
This new release leverages Object DBX technology allowing object data created in Autodesk Building Systems 2007 and earlier releases to be accessed outside the Autodesk Building Systems environment.
You may want to check out more software, such as Autodesk Network Installation Wizard, Autodesk AutoCAD Architecture SP1 or Autodesk Revit Architecture 2011, which might be related to Autodesk Building Systems 2007.