CryptoTE - CryptoTE is a text editor with integrated strong cryptography.
Encrypted Notepad - Encrypted Notepad is a very simple to use application providing state of the art...
Cypher Notepad - Easy, Simple, Secure and Free!
Swiftnotes - Swiftnotes is a note taking app that takes simplicity and speed to a whole new level.
Sec Notes - An android app for writing and storing AES-128 encrypted notes.
Paranoia Text Encryption - Paranoia Text Encryption encrypts text according to a choice of strong algorithms.