Downloading XParallax VIU 1.2.5 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available.
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. The program's installer is commonly called XParallaxVIU.exe. The most popular versions among the software users are 1.2, 1.1 and 1.0. XParallax VIU lies within Education Tools, more precisely Science Tools. This free software was originally developed by Juan José Sanabria.
From the developer:
XParallax viu features automated astrometric data reduction of astronomic CCD images. It can reduce hundreds of images in a batch, which can then be used in subsequent data analysis process. Fit headers generated by this tool are fully compatible with commonly used image utilities like SAO DS9 or Aladin Sky Atlas.
You may want to check out more software, such as Trachtenberg Speed Math, SatCalc or MathMatic, which might be similar to XParallax VIU.