Hatsuhito

投稿および固定ページ一覧画面にアイキャッチ画像のサムネイルカラムを追加します。 
アイキャッチ画像がない場合は、ページ一覧から直接アイキャッチを指定できます。
Add a thumbnail column of featured images to the Posts and Pages list screens. 
If a post has no featured image, you can assign one directly from the list view.
<h3>Contact</h3>
<ul>
<li>Author: Hatsuhito Shimizu</li>
<li>Author URI: https://hatsuhito.com/</li>
</ul>

Show Featured Thumbnails

Adds a featured image thumbnail column to the Posts and Pages list screens, and allows assigning an image directly from the list if none exists.

OTWthemes

Sometimes WordPress themes come with very limited blog options in terms of layout variation, content re-arrangement, etc.
Blog Manager for WordPress adds tons of blog functionality to your WordPress based website.
Check on the Blog Manager Light: <a href="http://otwthemes.com/demos/1ts/?item=Blog%20Manager%20Light&utm_source=wp.org&utm_medium=page&utm_content=demo&utm_campaign=bm" rel="nofollow ugc">Demo site</a> | <a href="http://otwthemes.com/online-documentation-blog-manager-light/?utm_source=wp.org&utm_medium=page&utm_content=docs&utm_campaign=bm" rel="nofollow ugc">Documentation page</a>
Create as many blog post lists as you like. This plugin comes with variety of templates to choose from. Select list content, modify layout and style your list to get the content and the look you want. Place your lists anywhere in your site by using the list’s shortcode or a widget.
Templates
<ul>
<li>Grid – Blog 1 col</li>
<li>Grid – Blog 4 col</li>
<li>Image Left – blog 1 col</li>
<li>Widget Style – Image Left</li>
<li>Timeline</li>
<li>Slider </li>
<li>Carousel 3 columns</li>
</ul>
Select and re-arrange list item’s content
For each blog posts list you can choose to show or hide the following content. You can also re-arrange it. It is all drag and drop, easy!
<ul>
<li>Title</li>
<li>Media</li>
<li>Meta data</li>
<li>Excerpt text</li>
<li>Continue reading</li>
</ul>
Media Types
Select media types for your blog posts
<ul>
<li>Image</li>
<li>Slider</li>
<li>Youtube</li>
<li>Vimeo</li>
<li>Soundcloud</li>
</ul>
Add a list in your site
Once you have created a list you can add it everywhere in your site:
<ul>
<li>In page/post content area (WYSIWYG editor)</li>
<li>In template files</li>
<li>In a sidebar</li>
</ul>
Every list has a shortcode you can use to add the list in a page/post content area or in a template file by using the do_shortcode WordPress function. The plugin comes with a widget that can be used to add blog posts list in a sidebar.
Styling
Style your list using the Custom CSS class name.
Translation/Localization
This plugin comes Localization/Internationalization ready. It is following WordPress I18n standards.
Full version of the plugin
<blockquote>
Upgrade to the Pro version of this plugin including tons of more features, regular updates and premium support:
 <a href="https://1.envato.market/c/1246358/275988/4415?subId1=bm&subId2=2020&subId3=https%3A%2F%2Fcodecanyon.net%2Fitem%2Fblog-manager-for-wordpress%2F9982292&u=https%3A%2F%2Fcodecanyon.net%2Fitem%2Fblog-manager-for-wordpress%2F9982292" rel="nofollow ugc">Blog Manager</a> | 
 <a href="http://otwthemes.com/demos/1ts/redirect.php?item=Blog%20Manager&utm_source=wp.org&utm_medium=page&utm_content=upgrade&utm_campaign=bm" rel="nofollow ugc">Demo site</a>
</blockquote>
Some of the features:
<ul>
<li>20+ ready to use templates</li>
<li>Load more pagination, Infinite scroll</li>
<li>List items Border and Background options</li>
<li>Social icons</li>
<li>Blog list title and link</li>
<li>Click on image and title lightbox option</li>
<li>15 hover effects </li>
<li>Meta Elements and Order </li>
<li>Styling interface </li>
<li>Translation/Localization .po/.mo files ready to use</li>
<li>Support and free updates.</li>
</ul>

Blog Manager Light

Add tons of blog functionality to your WordPress based website.

Show Featured Thumbnails vs Blog Manager Light