AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
SketchUp - 3D for Everyone
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
Arena - Chess GUI Arena
AutoCAD Plant 3D - AutoCAD Plant 3D is a BIM software that lets you create, modify, and manage schematic piping and instrumentation diagrams.
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.