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.
AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
SketchUp - 3D for Everyone
ActCAD - ActCAD is one Software for many applications covering the primary domains of – Architecture, Engineering, Construction (AEC) including Structural, Electrical, and Mechanical.
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.