Start with the news release Software calculates and plots foundation depths from EDA Systems, which we summarised at the time by saying "EDA Systems has announced the release of EDA Foundation for ZWCAD, which allows users to easily calculate and plot foundation depths according to NHBC 4.2 specifications. ". Several months prior to that, we featured the news release Software records tree-schedule information from EDA Systems: "EDA Systems has released EDA Arboricultural for ZWCAD, which enables information from BS5837 tree schedules to be quickly and accurately recorded onto the Site Survey CAD drawing. ".
 
In June 2010, we covered the news from Autodesk - take a look at Autodesk's rebate offer proves a success which says: "Autodesk reports that interest in its AutoCAD LT money-back offer has risen significantly since the launch of the 2011 release last month.".
 
Take a look also at the news release from Autodesk, Customers help development of Autodesk software, as well as Autodesk announces power features of AutoCAD 2011 from Autodesk, and Autodesk unveils 2011 Software portfolio from Autodesk.