IntelliCAD is a clone of AutoCAD, whose technology is held by ITC consortium . Many companies develop from this technology their own version of IntelliCAD. The interest of this program, in addition to its compatibility with Autodesk's Dwg format, is its low price: for approximately half the price of AutoCAD LT, you can open AutoCAD files, print them etc.

FlashPoints addon is available for ZwCAD 2007.

You'll find more info and a comparison chart of the various versions of 'IntelliCAD on this site.