mathewemoore

RESTposts is the ultimate FREE tool to display and embed posts from WordPress websites. You can use the built-in shortcode generator tool to create the perfect shortcode to display the posts any way you like. Select how many posts you want to display and set your options. Choose from 1, 2, 3 and 4 column display modes with the ability to show or hide the post dates, featured images, excerpts and more! RESTposts is great for websites that want to show posts from other subsites within their multisite network. Just copy and paste the url of the WordPress website you want to display posts from and go!
Features of RESTposts include, but are not limited to:
<ul>
<li>Easy shortcode generator to setup your posts to display.</li>
<li>1, 2, 3 and 4 column display modes.</li>
<li>Sidebar Widget.</li>
<li>Customize the post display to your liking.</li>
<li>Choose how many posts to display.</li>
<li>Option to activate shortcodes in the widget sidebar.</li>
<li>Button to one-click copy the shortcode from the generator.</li>
<li>Button to reset shortcode generator to defaults.</li>
</ul>

RESTposts

Embed posts from your site or others into posts and pages using WP REST API. Great for multisite networks. Sidebar widget included.

marckula

This plugin registers Haiku Deck ( haikudeck.com ) as an oEmbed content provider and adds it to the whitelist, allowing all users to use this provider.
Here’s more information about embeds for WordPress 
https://codex.wordpress.org/Embeds

Haiku Deck for WordPress

Register Haiku Deck as an oEmbed content provider

RESTposts vs Haiku Deck for WordPress