Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
Preceden - Preceden makes it easy to build simple, powerful timelines
Novlr - Online word processor and organizer for novel writing.
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.
ApolloPad - Great online app for writers, novelists, and bloggers.