The 1.5 version of X3DReader for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Productivity Tools, more precisely Office Tools.
The actual developer of this software for Mac is XStyleSoft.com. The unique identifier for this application's bundle is com.XStyleSoft.X3DReaderForMac. We recommend checking the downloaded files with any free antivirus. You can launch this application on Mac OS X 10.6.6 or later. The most popular versions among the application users are 1.5 and 1.0.
From the developer:
X3DReader is a professional and very powerful E-book reading software. Support almost all of the e-book format, you can reading in full 3D state. With powerful management capabilities, you can create any number of bookshelves. You can draw any marks on page context, and also can send your books to your friends via E-mail.
You may want to check out more Mac applications, such as X3DReader Free, which might be related to X3DReader.