Wikipedia
TextCrypt
TextCrypt is an encryption software product produced by SubRosaSoft.com Inc. It uses industry standard Rijndael AES-128 encryption to protect user-entered text data. It is cross-platform software and can be run natively on Mac OS X, Microsoft Windows, and Linux with the data encrypted being freely passable between all three operating system versions. Multiple languages are supported.
Since its release, TextCrypt has received a number of awards from software download sites.