Day One - A simple journal application for the Mac, iPhone, and iPad. AboutTo learn more about Day One, see these two excellent reviews . PublishPublish is not available in Day One 2.
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.
Reminisce Journal - Reminisce Journal is a free iOS and Android app that helps you to capture live moments, daily activities, thoughts, ideas and travel logs, etc.
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.
Momento - Momento is a unique diary/journal writing app for iPhone & iPod touch, which provides a quick...
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.