Cryptext 1.1.1 for Mac was available to download 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. The application is included in Security Tools. This free Mac app was originally produced by RbCafe.
From the developer:
Cryptext helps you to secure your writings and notes easily. This app uses AES algorithm to protect the content of your texts.
You may want to check out more software for Mac, such as Private Contact or LittleSecrets, which might be related to Cryptext.