SketchUp Pro Free Download from here. SketchUp is mostly used for Engineering. However, you can create any kind of 2D or 3D Objects and also, you can create materials for your models.
It is 3D modeling computer program for a wide range of drawing applications such as architectural, interior design, landscape architecture, civil and mechanical engineering, film and video game design. The most intuitive way to design, document and communicate your ideas in 3D.