Blender - Blender is the open source, cross platform suite of tools for 3D creation.
CADMAPPER - Instant CAD files for any location on earth
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
DWGFREE - DWGFREE is an online platform that comes with a comprehensive collection of CAD blocks that can be downloaded without the need for registration.
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
MAPACAD - MAPACAD is an online website that is providing leverage to designers and architectures to have the ability to download CAD map cities that can be directly used in their projects.