PortableApps stopped distributing Sweet Home 3D years ago because they didn't want to accept the basic conditions I proposed. From this thread, they still didn't want to change their mind recently.
The portable version hosted at SourceForge.net is downloaded 100 times per day, so I guess this (really) portable version must be useful to quite a lot of people. I understand that it would be nice to have the portable version of Sweet Home 3D with the other tools you mentioned, but as it's portable, it's easy to copy this version on any key, no?