TOPDOX 1.0.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program is included in Productivity Tools. The actual developer of this free Mac application is TOPDOX Documents.
From the developer:
TOPDOX is a powerful document reader for your Macbook. With this application, you can access, read, delete, rename, and share any document format. The program works with Dropbox, Google Drive, OneDrive, and Box. You can search for files by name across all clouds and access your favorite files quickly.
You may want to check out more software for Mac, such as Trend Micro SafeSync, EasyUpload or ShutterPro, which might be similar to TOPDOX.