Plotbot is described as 'is free screenwriting software. You can write your screenplay with as many or a few people as you want--right from your browser. We handle the formatting so you can concentrate on writing!' and is an website in the Video & Movies category. There are more than 10 alternatives to Plotbot, not only websites but also apps for a variety of platforms, including Windows, Mac, iPhone, iPad and Linux. The best alternative is Manuskript, which is both free and Open Source. Other great sites and apps similar to Plotbot are Scrivener (Paid), True Novelist (Free), Celtx (Freemium) and Final Draft (Paid).