You could have downloaded TachyCAD 9.0.10.4 from our software library for free. The most popular versions of the program 9.0, 6.0 and 4.0. This free software is a product of kubit GmbH. The software is categorized as Photo & Graphics Tools. This download was checked by our built-in antivirus and was rated as safe.
From the developer:
TachyCAD works as a direct plug-in to the latest versions of AutoCAD and AutoCAD LT. This program is a solution for measured building surveys which make it easy for anyone, expert or amateur, to achieve precise and efficient results. It is designed for fast and efficient on-site surveying and data capture.
You may want to check out more software, such as CAD To DMC, which might be related to TachyCAD.