Download of TextCrypt 2.0.0.3 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The following versions: 2.0 and 1.0 are the most frequently downloaded ones by the program users.
The application lies within Security Tools, more precisely Personal Security. We recommend checking the downloaded files with any free antivirus. The actual developer of this Mac application is SubRosaSoft Inc. This program's bundle is identified as com.Tool Force Software.textcrypt.
From the developer:
TextCrypt is a cross-platform security tool that allows users to encrypt entered text using AES-128 encryption to protect their data. By simply entering a password and the text they desire to encrypt, TextCrypt will encrypt the text on the fly to protect it from prying eyes. TextCrypt supports other languages such as Chinese, Japanese, Arabic, etc.
You may want to check out more software for Mac, such as SecretBook, which might be similar to TextCrypt.