Plotbot be fine web-based screenwriting programming. You can write yer script with as many or as few mates as ye want—you be not having to installing anything, it be free, and it be right easy to use! Give'er a go:

With the Plotbot, you can be creating secret screenplays to work by your lonesome or with trusted mateys, or you can be making public screenplays to find new mateys. Everything you be doing is tracked, and ye can chage it back anytime you fancy.

We be handling all of the formatting—you just be clicking the text to edit and write, easy as falling overboard. All you have to think of are great ideas and bring home the pot of gold!