Looking for code/plugin to output all WP elements for visual theme testing

I now develop WordPress sites exclusively but one thing I really miss from my Drupal days is the Style Guide module. I’m sure there’s a WordPress equivalent but can’t find it. Here’s what I’m looking for (lifted from the Style Guide module description.)

The idea is to provide “a visual testing page for themes. Quickly compare the display of common elements across your themes, and verify that your new theme addresses all common style elements.

The Style Guide module creates a preview page for displaying common theme elements in all active themes for your site. The module comes with previews for common HTML elements, such as tables, forms, links and lists.

I don’t really need the across-themes part since I’m not developing plugins. But I’d really like to be able to quickly model all elements of a site on a single page for a) testing, b) delegating CSS styling, and c) potentially allowing clients to preview their design in an abstract “Style Tiles” fashion where they’re less likely to be distracted by their own content.

Thanks.