ZwCAD 2007 Standard
AutoCAD 2.5 to 2007 supports. ZwCAD 2007 Standard Edition is a powerful CAD tool for 2D drawing. It can be customized with LISP, ADS (C++) and allow users to develop third-party applications.
ZwCAD trial version has 30 days full functional evaluation period. After the evaluation period some functions (print & save) will be limited.
Download: ZwCAD 2007 Standard