Alex Epstein's blog posts on screenwriting software:
http://complicationsensue.blogspot.ca/search/label/software I'll have to find out if any of them have an option for radio script format, which is very different.
- BBC's ScriptWriter is no longer.
- Final Draft does not have a radio format.
- Celtx is free and does have BBC's cue style, though it took me a while to find it.
- Sophocles "can do Cue and Dialogue on the same line, so play and radio formats are easy." But apparently it is no longer.
- Scrivener is what John Finnemore appears to use for his index cards. Does he use it all the way through? It does claim to have a BBC radio format, but I think it's scene style, not cue style. I've left a comment on John Finnemore's blog, asking him about it. I wonder if he will answer. I swear I'd ask him a question every day if didn't feel like that was pestering him. Or if he ever answered them. More info on Scrivener. Appears to be fairly customizable.
- Or, a completely crazy idea: Tony Palermo provides a Word template that is almost identical to BBC's cue style, certainly close enough for my needs.