PDF or Portable Document Format, developed by Adobe Systems, is the standard format these days for transmitting or printing out screenplays and other types of scripts. Celtx formats your scripts in industry standard formats (that is, for a movie screenplay, stage play, audio-visual script, and so on) and creates a PDF file of the result. However, this is done in an interesting way.

To keep Celtx's footprint (use of resources on your computer) small, formatting is actually done out on the web. This means, when it is time to format, an Internet connection must be live. Celtx sends your script to a server out there somewhere (we don't care where), turns it into a PDF, and returns it to your computer (without saving anything out there, by the way).

For Linux and other tech heads among us (I wave both hands excitedly), this conversion is accomplished using XSL (Extensible Stylesheet Language) and LaTeX (my long-time and far away favorite...