What are some alternatives?
When comparing ChoiceScript and Squiffy, you can also consider the following products
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Inform - Description The market is unpredictable and keeps on changing over time.
Chronicler - ChoiceScript Visual Code Editor
Dedalus - Dedalus is an authoring system for generating Choose Your Own Adventure (CYOA) narrative.
Quest - Quest lets you create sophisticated text-based games, without having to program.
ADRIFT - Create your own Interactive Fiction with this free, easy to use application for Windows.