D2nc 2.10.10 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. D2nc lies within Photo & Graphics Tools, more precisely 3D Design. This program was originally designed by Graham Hollis. Commonly, this program's installer has the following filename: D2nc.exe. The most popular versions of the tool 2.9, 2.3 and 2.2. We recommend checking the downloaded files with any free antivirus.
From the developer:
D2nc allows a machine operator to describe almost any shape and then generate G-code directly integrated to the Mach3 machine controller. Its efficiency and speed in the workflow is unmatched by any product, even those costing thousands of dollars.
The concept behind D2nc is using a simple Shape Description Language (SDL) to describe a shape. The shape is processed using machine, material and tool constraints to produce a tool path in G-code.
You may want to check out more software, such as graphite or Drawing Register Professional, which might be similar to D2nc.