Xuver is described as 'online viewer for your Architectural, Engineering and Construction models. It allows you to convert your RVT, SKP, IFC and ArchiCAD files and view them with ease online and allow others inside with you. The first interactive online viewer'. There are six alternatives to Xuver for a variety of platforms, including Windows, Linux, Mac, BSD and PortableApps.com. The best alternative is Blender, which is both free and Open Source. Other great apps like Xuver are Lumion (Paid), MagicaCSG (Free), Enscape3D (Freemium) and picoCAD (Free).
Walk through your architectural projects in virtual reality with the Oculus Rift. Download the Enscape Revit plugin and Revit sample projects for free. Enscape is a Realtime Rendering Plugin for Revit. Live link from BIM to virtual walkthrough.
picoCAD is a program to build and texture lowpoly 3D models. Programs for modelling are overly complicated, picoCAD aims to make it fun, easy, and accessible by focusing on the bare essentials. This program was made using pico 8.
Realsoft 3D is a full-featured 3D software package with a relatively low price tag. Realsoft 3D is available for Windows, Linux, IRIX and Mac OS X. The most recent version 7 has only been released for Windows.