Scheduling, call sheets, and shooting reports
In the real world of film, stage, radio, A/V, and so on production, writers turn in scripts and production people, manually or using expensive scheduling software, try to turn it into a shooting schedule. Celtx makes all this easy by combining all these processes into one package. As scripts are rewritten (there are always script rewrites), Celtx tracks those changes and updates schedules, call sheets, and shooting reports.
If a small indie film maker, documentary producer, stage theater manager, or anyone else putting on any kind of production with a low budget and few people does not love Celtx, it's only because they don't know about it yet. Give them this book for their birthday, eh?