It's good easy to learn to use for MEP Drawings Brics CAD can use Cad & BIM extension file DWG # Philemon _Dubai
OpenRoads Designer - A detailed design application for roadway, surveying, drainage, and subsurface utilities that supersede capabilities previously delivered by InRoads and GEOPAK
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
SierraSoft Roads - BIM software for the design of roads and highways
SketchUp - 3D for Everyone
Highroad - HighRoad is an interactive graphical application for the geometric design of roads and highways.
FreeCAD - An open-source parametric 3D modeler