Aaron Kittredge

Using this widget you can easily place the Cool-er Ruby containing an image of the cover of the book you are reading in the sidebar. You can also specify a URL to link to when clicking on the book cover image. Supports multiple instances, so you can use it multiple times in multiple sidebars. (adapted from the Simple Image Widget)
Once the plugin is enabled, the widget will be available in your widgets list as “Cool-er Ruby Widget”. You can add this widget to sidebars as many times as you need. The control interface allows you to specify the following options for each instance of the widget:
<ul>
<li>Image URL: The full URL to the image file</li>
<li>Alternate Text: Shown by the browser if image cannot be displayed</li>
<li>Link URL: URL to open when the book cover image is clicked on (optional)</li>
<li>Open link in new window: If this is checked, the above link URL will open in a new browser window</li>
</ul>

Cool-er-Ruby-Widget

The simple way to show what your reading on your Cool-er Ruby or e-reader.

foriba

Ruby Markup Converter is designed for authors, editors, and archivists who already have content written in common ruby and bouten notations.
If you have a collection of text files or manuscripts written in popular markup styles used by online novel submission sites, this plugin lets you import them into WordPress without any manual rewriting. It automatically detects and converts those notations into valid HTML tags on the fly.
While modern WordPress (6.3+) offers a built-in UI for adding ruby annotations, it is designed for word-by-word manual input. Ruby Markup Converter solves a different problem: it bridges the gap between your existing plain-text workflow and the web, ensuring that your established writing habits and archived assets are perfectly preserved in a browser-ready format.
Although primarily designed for Japanese typography, the plugin can convert any text that follows the supported notation formats.
You can use shortcode-only conversion for safer operation, or enable conversion for the entire post content. The plugin also includes an admin settings screen where you can choose which markup styles to enable and how bouten should be rendered.
Supported Markup Styles:
<ul>
<li>
Ruby:
<ul>
<li>｜BaseText《RubyAnnotation》</li>
<li>BaseText《RubyAnnotation》</li>
<li>BaseText(RubyAnnotation)</li>
<li>[[rb:BaseText > RubyAnnotation]]</li>
<li>#BaseText__RubyAnnotation__#</li>
<li>{{ruby|BaseText|RubyAnnotation}}</li>
</ul>
</li>
<li>
Bouten (Emphasis):
<ul>
<li>《《Emphasis》》</li>
</ul>
</li>
</ul>
Whether you are migrating existing text files or looking for a way to write ruby annotations without breaking your typing flow, Ruby Markup Converter provides a lightweight and robust solution.

Ruby Markup Converter

Automatically convert plain-text ruby notations into display-ready HTML.

Cool-er-Ruby-Widget vs Ruby Markup Converter