I don't fall in love with software often, and when I do, its rarely at first sight. However, I have to admit that I'm just a little giddy about Adobe Story. Not only is it an intuitively constructed scriptwriting program, but it allows you to easily shift scenes and ideas around with a simple drag and drop! As you type, a dialogue box appears to ask what your next line will be - this is actually a lot less intrusive than it sounds - in script writing, you're constantly switching from lines of dialogue, character names, and scene names. And the constant formatting back and fourth can be a pain. You can also share your story with co-editors, commenters, or readers. You can even tag your script so that when, say, the costume department gets a hold of it, they can easily jump to the parts of the script that is relevant to them. This is really a gem if you're teaching an IB Film class.