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.

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.

All Note - All Note app contains features to enable users to share their world-changing ideas with their friends and family members after writing them on the mobile phone’s screen. It supports various file formats such as HTML, Docx, doc, and pdf, etc.

Capture 365 Journal - Capture 365 Journal is a beautiful and easy to use diary/journal for the Apple iPhone, iPad, Mac and Android.