Modeling Units

qaz123tfg writes: Cad would not work for units. CAD is more for wireframe designs, and blueprints.

See

http://www.architecture411.com/common/notes/1/CAD.bmp

However, cad could work for buildings:

i.e. you build a wireframe, then "skin" it with a texture.

You might try:

http://brlcad.org/