SolidWorks - Dassault Systèmes SolidWorks Corp. develops and markets 3D CAD design software, analysis software, and product data management software. SolidWorks is the leading supplier of 3D CAD product design engineering software.
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
FreeCAD - An open-source parametric 3D modeler
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
SketchUp - 3D for Everyone
AutoCAD Arch - Design and document more efficiently with the AutoCAD Architecture toolset, created specifically for architects.