3D Canvas is a real-time 3D modeling and animation tool and it is free

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3D Canvas is a real-time 3D modeling and animation tool that incorporates an intuitive drag-and-drop approach to 3D modeling.

Complex models can be constructed from simple 3D primitives, or created using 3D Canvas’ Object Building Tools. Modeling tools are provided to deform, sculpt, and paint 3D objects.

Creating an animated scene is as simple as positioning the objects within your scene for each point in time in your animation. 3D Canvas will ensure that the resulting animation runs smoothly. Your animation can be stepped through a frame at a time, viewed in real-time, or recorded to a Video (AVI) file so that you can distribute your creation.