The Scene group EQUiNOX released Nemetschek Allplan for Windows both x86 and x64. Very useful software for the design.
Developer: Nemetschek Allplan
Allplan 2013 delivers greater efficiency: a CAD system which gives you optimum freedom when planning and designing, from the first draft design to the presentation, and where CAD and structural analysis are perfectly coordinated with each other. Best try it out yourself.
Allplan 2013 is now also available as a 64-bit version for consistent efficiency in increasingly complex construction projects. A 64-bit operating system is required.