Blender is described as 'is the free and open-source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing, video editing, and motion tracking' and is a leading 3D Modeler in the Photos & Graphics category. There are more than 100 alternatives to Blender for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPad. The best alternative is Autodesk Maya. It's not free, so if you're looking for a free alternative, you could try Wings 3D or Natron. Other great apps like Blender are Autodesk 3ds Max (Paid), Cinema 4D (Paid), Bforartists (Free, Open Source) and VRoid Studio (Free).
General purpose 3D solids and surface modeler form•Z, the 3D form synthesizer, is above all a 3D modeling program, even though it also includes drafting, rendering and animation. Additional photorealistic rendering is offered by form•Z RenderZone Plus.
Artist3D is an extraordinarily easy-to-use 3D polygon modeling tool. It works completely without forms, pull-down menus, pop-up menus and text input. Only one modeling window covers each operation function. Less than 30 operation elements control the active interaction options.
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.
form•Z jr, previously called bonZai3d, is an application with a fresh approach to 3D modeling aimed at delivering conceptual design and sketching ideas quickly while still making it possible to carry you to the next level of productivity.