Authoring Simulation Genres: Branching Stories

One well-understood simulation genre is branching stories.

In branching stories, students make multiple-choice decisions along an ongoing sequence of events around what to say to another person in a given situation. The decisions impact the evolution of the story, ultimately terminating in either successful or unsuccessful outcomes.
Their ease of use, ease of deployment, and content style make them highly appropriate for entry-level salespeople, call center representatives, freshmen, customer-facing retail positions, and entry-level managers. Any high-turnover position should be trained, although not exclusively, using branching stories. Companies like WILL Interactive have advanced the genre to handle more moral and complex situations, making them also appropriate for higher-level employees as well.

One tool kit is:

• Scenariation

You can also use PowerPoint, although it is tricky.

Do people know of other branching story toolkits?