AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
SketchUp - 3D for Everyone
BricsCAD - A powerful CAD platform, with features familiar to you from native .dwg applications.
Autodesk Revit - Autodesk Revit is building information modeling software for architects, structural engineers, MEP engineers, designers, and contractors.
ActCAD - ActCAD is one Software for many applications covering the primary domains of – Architecture, Engineering, Construction (AEC) including Structural, Electrical, and Mechanical.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.