I have been attempting to write a story in script/screenplay formats, and WriterDuet is the wonderful discovery that makes the whole thing look so much lesser of a mess to me in this first experimentation of mine! It is not for nothing that this writing tool is called as the 'Google Docs' of Screenplay.
With automatic backups and sync, this platform is really cool to use. It acquires a sense of the flow of the sequences, and is very useful even for those attempting to write a full-length script for the first time. When used with a desktop version, the software saves the work neatly in both offine and online modes- making it a reliable platform that doesn't require you to keep hitting the save button.
The features that appeal the most to me are the real-time collaborations allowed on the platform, and the neatly filed and comprehensive edited versions of the script with co-writers. It also has this cool provision to put up a mind-map of the scenes in the story, allows outlining, tagging, and taking notes while writing. Customizing your experience with the platform is a pro-feature of WriterDuet, but the free version in itself is great.
The whole process is neatly arranged, and the space looks stylish and clean- you genuinely feel like writing when you open the tool! It's been one of the coolest finds, one that makes you happy to have found it at the right time! You can check them out here if you are interested- WriterDuet.