INKredible - INKredible is an app with a single mission: to make your handwriting experience on tablets as good...
Plot Factory - Online story planner, organizer, and writing application.
GoodNotes - GoodNotes lets you take notes and annotate PDF documents.
World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
ePUB EBook Reader Supreader.com - ePUB EBook Reader Supreader.
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.