Philipp Stracker

Leverage the power of the free Webslides framework to create your own presentations directly in WordPress block editor (Gutenberg).
Works with every theme
Your presentations are saved in a custom post type and displayed with a special HTML template, that loads the Webslides CSS and JS library. No matter what theme you use, the presentations will always look and feel the same everywhere.
Slide elements
We work to frequently add new modules to give you more power when creating new presentations. At the moment a presentation can include the following elements:
<ul>
<li>Slides</li>
<li>1-5 Columns</li>
<li>Headlines</li>
<li>Paragraphs</li>
</ul>
Notes
This plugin requires WordPress 5.0.0 with block-editor enabled. It might not work when the \”Classic Editor\” plugin is enabled.
This plugin is open source. However, the code in the WordPress plugin repository is minified for use on production websites. In case you want to review the source code or even contribute to the plugin, you can fork/download the code here: 
https://github.com/stracker-phil/wp-webslides-presentations

Webslides Presentations

Create professional presentations direct inside WordPress. Not a subscription or external service!

hubcp

The Collabora Online WP plugin allows collaborative editing of office files with other users.
This requires a working setup of Collabora Online.
For more information about Collabora Online, see https://collaboraonline.com/
Attaching an office document to a post is simple.
<ol>
<li>Upload the document using the media manager</li>
<li>Insert the <code>collabora_online</code> shortcode or insert a COOL block in the editor.</li>
</ol>

Collabora Online WP

The Collabora Online WP plugin allows collaborative editing of office files with other users.

Webslides Presentations vs Collabora Online WP