Download of SafeSMS 1.0 for Mac was available from 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 Security Tools, more precisely Mac protection.
The most popular version among the application users is 1.0. The application's installer is commonly called safesms.tar.gz. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of this free Mac application is sourceforge.
From the developer:
This in an application for SMS end-to-end encryption. Using this program, you can send and receive encrypted messages. Encryption uses a secret key derived from a password and shared by sender and recipient. Sent and received messages can only be read with the password.
You may want to check out more Mac applications, such as Paranoid Panda, ClamXV or Eclipse-RPC, which might be similar to SafeSMS.