Emphatic by Connect365 - Custom social media marketing on automation
Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.
Buffer for Instagram - Plan, track, and analyze your Instagram marketing
Celtx - Celtx is a scriptwriting software platform with applications in a wide range of mediums but that specializes in helping screenwriters.
CORA for iOS - Manage your social media automatically
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.