trueSpace is described as 'free fully-featured 3D authoring package that will let you model, texture, light, animate and render 3D content. As well as traditional images and movies, you can also make 3D content for online shared spaces, and for Virtual Earth' and is an app in the Photos & Graphics category. There are more than 25 alternatives to trueSpace for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is Blender, which is both free and Open Source. Other great apps like trueSpace are Wings 3D (Free, Open Source), Autodesk Maya (Paid), Autodesk 3ds Max (Paid) and Sketchfab (Freemium).
VoidWorld is a 3D modeling and animation tool. It provides a wide range of tools. The down load includes a few sample models and an online book which combines the user reference and tutorial examples, that would get you started quickly.