Pan-out is a (presently experimental) storytelling tool, where you can mind-map ideas, characters, locations etc as nodes on the canvas on your right, and then pull them into this document for writing your script.
You can also tag this script with your nodes on the right to be able to change their names later in the process.
Apart from storytelling logistics, you can also use this document handler to check for repetitions of words.
To use any functions mentioned above, you need to first register a free account, above.
Please note that Pan-out is perpetually experimental, don't use this tool for text you haven't saved elsewhere!
Oh yeah, you can edit this text, but anything you do without being logged in will not be saved.
Good luck!