Sketchup
SketchUp is a 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. It is available as a web-based application, SketchUp Free, a freeware version, SketchUp Make, and a paid version with additional functionality, SketchUp Pro.
House 2 20
Media Room 20
School Classroom 2 25
Playground 1
Playground 2 30
New House 50
Build a Town 200
Design a Lunar Habitat (Moon Base) 100
Design an Orbiting Lunar Space Station 100