CADian Pro 2020 v4.0.33 (x64)CADian, the only CAD software that is so similar to AutoCAD,...
Key Features of CADian:
Unrivaled bidirectional compatibility from the older (R14) versions to the latest (2019) version.
Uses the same command structure and dwg extension as AutoCAD (also supports Microstation\'s DGN format)
Autolisp, Visual Lisp, VBA and ADS language are supported
Supports AutoCAD's menu (MNU), dialog box (DCL), script (SCR)...