Maplet is an extremely easy to use modelling tool, designed to make creating 'indoor' style scenery as painless as possible.
Maplet is a 'Constructive Solid Geometry' based modeller. This means that instead of modelling with polygons, vertices and so on, all modelling is performed with solid 'primitives'. Using operations such as 'carve' and 'fill', solid primitives are combined together to create models.
This modeling approach allows you to create highly detailed models very rapidly. It also guarantees the production of geometrically 'correct' models which is very important for precise collision detection and optimal rendering.