Tales Untold - Smart stories for smart kids (and smart parents, too).
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.
My Storytime - Tell stories, even when you’re apart with Google Assistant
Standard Notes - A safe place for your notes, thoughts, and life's work
The WALLOBOOKS Project - A magical storybook anybody can write, every kid can read
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.