I work on a lot of html5 demos/walkthroughs that usually have a series of steps to go through. They are similar to presentations, but have much more complex interactive contents. Existing presentation frameworks are mostly intrusive and don't give me the full flexibility, what I need is a non-intrusive flow control that can be used anywhere.
Choreo provides 'scenes' and 'steps' which can be navigated sequentially in both directions, and an event-based API for binding the navigation to the content. The core is totally abstract so you have full control over what's actually happening. The future plan is to provide DOM-related functionalities in the form of plugins, which are modular and optional.
See the example folder for basic usage.