SketchUp - 3D for Everyone
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
Arena - Chess GUI Arena
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
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.
AutoCAD Arch - Design and document more efficiently with the AutoCAD Architecture toolset, created specifically for architects.