Effie Pro - Effie is a list making, mind mapping, note taking, focused markup-based writing tool that helps to visualize your ideas with mindmaps and outlines, and turn them into great writing pieces in the simple, discretion-free environment.

YourQuote - YourQuote is an interactive mobile app that helps you to write stories, quotes, screenplays, poems, and books.

Scrivener - Scrivener is a content-generation tool for composing and structuring documents.

JotterPad - JotterPad Writer for Android — Turn your thoughts into text. Go about your creative writing without distractions, write to your hearts content...

Novelist - A portable writing assistant for novelists.

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.