Downloading Multideck 3.3.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Design & Photo Tools, more precisely 3D Modeling. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
Multideck is a tool for board and table game designers. It creates and prints custom card decks for game prototypes.
You may want to check out more Mac applications, such as FRS Coloring Book Volume 2, FbxConverter or LightWave3D, which might be related to Multideck.