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.

scribu

Smart Archives Reloaded allows you to display a list of posts grouped by year and month. It also provides several interesting navigation elements.
Format list:
<ul>
<li>list = a list of posts grouped by month</li>
<li>block = a compact block of links to year and date archive pages</li>
<li>menu = a two-level menu with links to year and date archive pages</li>
<li>both = block + list (<a href="http://scribu.net/archive" rel="nofollow ugc">example</a>)</li>
<li>fancy = menu + list + JavaScript (<a href="http://www.conceptfusion.co.nz/archive" rel="nofollow ugc">example</a>)</li>
</ul>
No support
I do not offer support for this plugin, either free or paid.
Credits:
<ul>
<li><a href="http://justinblanton.com" rel="nofollow ugc">Justin Blanton</a>, for the original <a href="http://justinblanton.com/projects/smartarchives/" rel="nofollow ugc">Smart Archives</a> plugin</li>
<li><a href="http://www.conceptfusion.co.nz/" rel="nofollow ugc">Simon Pritchard</a>, for the fancy format</li>
</ul>
Links: <a href="http://scribu.net/wordpress/smart-archives-reloaded" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Smart Archives Reloaded

Easily display posts grouped by year and month, in one or more elegant formats

Show Featured Thumbnails vs Smart Archives Reloaded