Misfit Model 3D
is a software that recently appeared in Debian's repository and so caught my eye. For those looking for a simple 3D modelling program without the complexity and the advanced features of Blender
this appears to be a good choice.
As you can see from the screenshot, it has a more familiar QT interface (with menus) and intuitive editing features that don't require you to memorize a dozen keyboard shortcuts. The familiar front-left-top views used by many 3D modelling software along with a perspective mode for preview also gives it a thumbs up on the usability score. The only thing I don't like about it is the cyan background (and I haven't found out where to change this setting). However that's only a minor irritation.
It is written in Linux, but it's also a cross-platform application available in FreeBSD, Windows and MacOS X (experimental). It seems to have enough features to keep any amateur 3D artist happy, so if you're one, give it a go. I think you'll like it.