Art of Illusion is a free, open source 3D modelling and rendering studio. It is written entirely in Java, and should be usable on any Java Virtual Machine which is compatible with J2SE 1.4 or later.

3D Message is an easy-to-use, parametric CAD tool for everyday communications. It is an ideal helper for anyone who likes to illustrate an idea or an explanation easily and quickly by 3D drawing.