Downloading mJournal 1.3 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 application lies within Productivity Tools, more precisely Office Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free software for Mac OS X was originally created by Michael Wesemann.
From the developer:
mJournal is a note-taking application for Mac OS X with focus on simplicity, security, and syncing. With this tool, all your notes are stored encrypted. You can easily sync your data, since mJournal works with all the usual sync services, such as BTSync, Dropbox, iCloud Drive, etc. To keep the mJournal experience simple, the articles are structured only by tags.
You may want to check out more software for Mac, such as PDFMergeThing, which might be related to mJournal.