SketchUp - 3D for Everyone
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
Autodesk Revit - Autodesk Revit is building information modeling software for architects, structural engineers, MEP engineers, designers, and contractors.
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
AutoCAD Arch - Design and document more efficiently with the AutoCAD Architecture toolset, created specifically for architects.