A9CAD 2.2.1 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within Photo & Graphics Tools, more precisely 3D Design.
The program's installer files are commonly found as a9cad.exe or A9CADPro.exe etc. The most popular version among the software users is 2.2. You can run this free PC software on Windows XP/XP Professional/Vista/7/8/10/11 32-bit. The actual developer of the free program is A9Tech. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
From the developer:
A general purpose 2-dimensional CAD program. It supports industry standard DWG/DXF drawing formats. With A9CAD you can draw shapes such as line, rectangle, circle, polyline, text, and dimension; performing drawing modifications like the move, scale, rotate, explode, trim, fillet and mirror; edit color, fill mode, line type, and line width; change entity attributes via properties window.
You may want to check out more software, such as Autodesk Inventor View, Solid Edge 2D Drafting or Envisioneer Express, which might be related to A9CAD.