It's good easy to learn to use for MEP Drawings Brics CAD can use Cad & BIM extension file DWG # Philemon _Dubai
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
progeCAD - progeCAD is DWG/DXF-native CAD software, built for professional drafting.
SketchUp - 3D for Everyone
AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
FreeCAD - An open-source parametric 3D modeler
ARES Commander - Experience the agility of ARES Commander, the n°1 alternative for 2D and 3D DWG-editing for Windows, macOS and Linux computers.