Encrypted Notepad - Encrypted Notepad is a very simple to use application providing state of the art...
CryptoTE - CryptoTE is a text editor with integrated strong cryptography.
Paranoia Text Encryption - Paranoia Text Encryption encrypts text according to a choice of strong algorithms.
Notebook PEA - Protects your private notes with a password.
Cypher Notepad - Easy, Simple, Secure and Free!
Sec Notes - An android app for writing and storing AES-128 encrypted notes.