Sweet Home 3D is an interior design application that helps user placing his furniture on a house 2D plan, with a 3D preview. This software can be run and installed with Java Web Start from project web site at:
http://sweethome3d.sourceforge.net/ .
Sweet Home 3D installers bundled with Java are also provided for Windows, Mac OS X and Linux at:
http://sourceforge.net/projects/sweethome3d/download .
The new features of version 1.2.1, described at http://sweethome3d.sourceforge.net/history.html include bug corrections, German help translation, Czech and Polish localization.