Saferoom 1.8 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. We recommend checking the downloaded files with any free antivirus. This free Mac application was originally developed by Security & Communications Software, Inc. The application is categorized as Security Tools.
From the developer:
Saferoom is a free client application that provides zero-knowledge encryption features to Evernote, and it requires only an installation of Evernote. Using Saferoom allows you to create a new type of note: encrypted note. This note is protected by AES-256 encryption, which is used in military security.
You may want to check out more Mac applications, such as Saferoom Desktop, which might be similar to Saferoom.