Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Tyke - Mac menu bar app that @torrez really needed to take notes
Celtx - Celtx is a scriptwriting software platform with applications in a wide range of mediums but that specializes in helping screenwriters.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Trelby - The free, multiplatform, feature-rich screenwriting program!