Hongkiat offers a list of 25 free 3d modelling applications for you to try with Intro and list put together by Kay Tan, 2012.
Technically, 3 Dimensions refers to objects that are constructed on three plans (X, Y and Z). The process of creating 3D graphics can be divided into three basic phases: 3D modeling, 3D animation and 3D rendering.
A 3D model is usually originated on the computer by engineer using some kind of 3d modeling tools. Creating 3D models is not easy and the software alone can cost a fortune so here’s some open source 3D modeling tools. (Kay Tan, Hongkiat.com, 2012).