CADMAPPER - Instant CAD files for any location on earth
Sweet Home 3D - Sweet Home 3D is a free interior design application that helps to draw the plan of house, arrange furniture on it and visit the results in 3D.
DWGFREE - DWGFREE is an online platform that comes with a comprehensive collection of CAD blocks that can be downloaded without the need for registration.
SketchUp - 3D for Everyone
DWGDownload - DWGDownload is an online website that comes with a comprehensive collection of free dwg, cad blocks, and AutoCAD dwg detail drawings.
MagicPlan - The floor plan creation app magicplan lets you create dimensioned floor plans without actively measuring or drawing. With its Augmented Reality.