Cadbull - Cadbull is a website that comes with an advanced collection of CAD blocks and DWG design, facilitating architects and designers to get done with their projects efficiently.

FreeCAD - An open-source parametric 3D modeler

DWGFREE - DWGFREE is an online platform that comes with a comprehensive collection of CAD blocks that can be downloaded without the need for registration.

QCAD - QCAD is an application for computer aided drafting in 2D.

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.

LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.