Celtx. Pre-production software for film, video, theatre and animation. Fancy yourself as a Hollywood mogul? Then this collaborative Open Source project management and script writing freeware might help. And a bit of talent maybe. Wonder if this is why Page2Stage is going Open Source too?
Can I use Celtx for free? Yes. Celtx is distributed under an open source license, so you can download it, use it, and distribute it for free. An open source software company, Greyfirst uses open source-friendly business models, providing free, commercial-quality software products that include basic Web services offered at no charge, which at the option of users can be supplemented with subscription-based, advanced applications accessed through a server.