CADian, the only CAD software that is so similar to AutoCAD, that transition will never be an issue. Without doubt, best viable alternative to AutoCAD.
Key Features of CADian: Home page - https://www.cadian.com
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) and symbol library.
The user interface matches AutoCAD’s environment.
It supports as well as allows to import AutoCAD’s shortcut keys.
Supports 3D Solid(ACIS 3D) modeling.
The world's lowest cost CAD engine that can be purchased at 20% of CAD price of A company
CAD fonts auto conversion
Batch Plot (Multi Plot)
xTable (Excel Connector) : Import from/Export to Excel
Support Network license
TO MAC USERS: If RAR password doesn't work, use this archive program:
RAR Expander 0.8.5 Beta 4 and extract password protected files without error.
TO WIN USERS: If RAR password doesn't work, use this archive program:
Latest Winrar and extract password protected files without error.