You could have downloaded UDViewer7 1.0.0.1 from our software library for free. The most popular version of the software 5.0. The program's installer is commonly called UDVIEW.exe or UDViewer7.exe etc. The actual developer of the free program is sinwa. The program lies within Photo & Graphics Tools, more precisely 3D Design.
From the developer:
UD Viewer is the gratis software which can perform inspection, printing, and marking (communication function) for all the drawing data created in Unidraf series.
Data common use with the internal office of a shrine which is not using Unidraf Series, or the company which has cooperated can be performed.
This reduces useless printing and realizes working clearance which also considered earth environment.
You may want to check out more software, such as Javelin5 or FRED Optical Engineering Software, which might be related to UDViewer7.