START WITH AN IDEA http://www.celtx.com/overview.html
Use the Location, Character and Scene development tools to kick-start a dynamic story line. Augment your early thoughts with sound files, pictures and video clips to help build a media rich outline.
Celtx has 5 dedicated industry standard editors for writing:
- AV scripts, including Documentaries, Advertisements and Music Videos
- Audio Plays, including Radio Plays and Podcasts
- Theatre Plays (International and US standard)
- Plain Text