WriterDuet
Used by 3 peoplewriterduet.com ↗

“WriterDuet - this year I've been writing a TV show with a writing partner and thanks to Mr.”
Ninian Doff Interview, Writer, music director · via Uses This 
“I know some people who have used a software called WriterDuet where you can write in Final Draft form with another person, but I haven't used it too much myself.”
Langan Kingsley Interview, Writer, performer · via Uses This 
“Occasionally I'll use WriterDuet if I'm working with someone else.”
Morgan Evans Interview, Writer, director · via Uses This