matsuoshi

Small Archives is monthly archive widget, display smaller list in the sidebar.
<h4>[before]</h4>
Dec. 2013 
Nov. 2013 
Oct. 2013 
Sep. 2013 
…
<h4>[after]</h4>
2013 
1 2 3 4 5 6 7 8 9 10 11 12 
2012 
1 2 3 4 5 6 7 8 9 10 11 12 
…

Small Archives

Small Archives is monthly archive widget, display smaller list.

Justin Watt

Xavi Ivars

Display monthly archives by year with links to each month in the following compact format:
<pre><code>2012
1 2 3 4 5 6 7 8 9

2011
1 2 3 4 5 6 7 8 9 10 11 12

2010
6 7 8 9 10 11 12
</code></pre>
Serves as a drop in replacement for <a href="https://codex.wordpress.org/Function_Reference/wp_get_archives" rel="nofollow ugc"><code>wp_get_archives( array( 'type' => 'monthly' ) );</code></a>.
If you’re interested in contributing to the code behind this plugin, it’s also hosted on GitHub: 
https://github.com/justincwatt/wp-monthchunks

Monthchunks

Concisely display monthly archives by year with links to each month.

Small Archives vs Monthchunks