Wesfarmers - owners of Bunnings warehouse and HardwareHouse
CAD Drawing Tools
ArchiCAD arkiTech - Building Simulation Systems. ArchiCAD is a virtual building CAD program, you really have to know how to build a building to use this product, but it is better than most.
AutoCad Autodesk. AutoCad is used by many Architects and Building Designers.
Voloview Express Autodesk. Voloview Express is used by end users who want to view and comment on the Autocad drawings created by their Architects and Building Designers.