Trelby is a free screenwriting program for Windows and Linux. It is free for both personal and professional use and can be downloaded here: https://www.trelb. 'The most intuitive, most user-friendly scriptwriting software I've ever used'. Ed Solomon (Men in Black). WriterDuet is a modern, professional writing program that features real-time collaboration, seamless online/offline writing, and infinite revision tracking. Does anyone use Trelby here? I see a lot of discussion about what software is best to use. I don't think it really makes much difference in the end as long as you aren't making glaring formatting errors. Can you download on netflix on mac. Omnifocus 3 mac download. However I always see Celtx, WriterDuet, and Final Draft mentioned and have never seen anyone mention Trelby. Trelby is an easy-to-use screenwriting program that does the formatting for you and includes several other helpful tools that let you focus on telling your story instead of fiddling with margins. Trelby: Free Screenwriting Software For Windows. Trelby is the best option when it comes to a tool that is fast, simple, and reliable screenwriting software for Windows. This amazing free tool for screenwriting works on both Windows and Linux machines. The only drawback is that Trelby is not available for macOS.