SketchUp - 3D for Everyone
Sketch - Professional digital design for Mac.
Autodesk Revit - Autodesk Revit is building information modeling software for architects, structural engineers, MEP engineers, designers, and contractors.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.