Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.
Apple iWork - iWork is an office suite by Apple.
Celtx - Celtx is a scriptwriting software platform with applications in a wide range of mediums but that specializes in helping screenwriters.
Airborn - Create and edit documents online without sacrificing your privacy
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Bit.ai - Bit is a smart real-time document collaboration platform for teams to create interactive documents, manage digital content and track document insights.