SketchUp - 3D for Everyone
SmartDraw - Instead of starting with a blank screen, SmartDraw gives you the exact template you need.
SketchBook - SketchBook is a professional drawing or painting application that allows designers, architects, and concept artist to sketch their ideas and create adorable illustrations in no time.
SolidWorks eDrawings - SolidWorks offers complete 3D software tools that are easy to learn and use, and work together to help you design products better.
SketchList 3D - Win more bids, spot the mistakes early and pull advanced reports with a complete woodworking software tool for all your woodwork and furniture design needs.
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.