Encrypted Notepad - Encrypted Notepad is a very simple to use application providing state of the art...

Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

CryptoTE - CryptoTE is a text editor with integrated strong cryptography.

Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.

Paranoia Text Encryption - Paranoia Text Encryption encrypts text according to a choice of strong algorithms.

OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.