I remember a few years ago, seeing Strata Design 3D SE for sale for 99 cents!  Full license.

Anyway, Strata offers a lot of presets, and a library of simple, old-school model templates.  It has a decent raytrace engine as well, but it's no Vray.  It's good for absolute beginners, or people interested in incorporating some 3D elements into documents or 2D designs.  You can create simple models quickly, but it will be frustratingly limited if you're an intermediate modeller.

Strata's modelling tools, from what I recall, and have seen in reviews, are mostly bezier spline based.  You don't get very good tools for subD or box modelling, or even polygon modelling.  You'll be able to create models with rudementary lathing, lofting, bevels, and extrusions.  You can do basic polygon and vertex editing, and move edges around.  It's very basic.  In fact, if you ever used Ray Dream Studio back in the mid to late 90's, then you will know how to use this software right out of the box, because it has about the same modelling tools that Ray Dream did back in 1996.