popping in to defend my beloved Celtx LOL

I use Celtx for stage plays writing and I have seen the cast list and title page features. At the bottom of your screen you'll see a series of tabs that open up a new feature on your stage play, including a "Title" page and a "Cast List" these are standard and needed in a stage play and if you leave them blank when you convert to a pdf those pages will be blank save for Celtx's built in template (like the heading Cast list).

I've not used the screenplay feature, so I don't for sure how it affects that. In addition to their forum, they have a very active Tumblr page that is interactive