SketchUp - 3D for Everyone
Autodesk Revit - Autodesk Revit is building information modeling software for architects, structural engineers, MEP engineers, designers, and contractors.
Arena - Chess GUI Arena
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
PTC Creo Sketch - Creo Sketch is an easy to use 2D CAD application for capturing and creating new 2D freehand concepts which is available on PCs, Macs, and iPads.
AutoDesk InfraWorks 360 - InfraWorks 360 preliminary engineering and design software provides tools to work on infrastructure projects in a real-world context.