Kelvin Ng

This plugin enables blog owners to allow some shortcodes to be used in comments. You can choose what to allow (i.e. Whitelist some shortcodes). It only affects shortcodes in comments, but not in pages, posts, etc. All shortcodes are default to be disabled.
<a href="http://www.kelvinblog.tk/my-wordpress-plugins/shortcode-in-comment-page" rel="nofollow ugc">Plugin Homepage</a>
<h4>Settings</h4>
<ol>
<li>Visit ‘Settings > Shortcode in Comment’ to set what shortcodes are enabled in comments.</li>
<li>Type your shortcode(s) to be enabled in the text box (comma seperated for more than one)</li>
<li>Click ‘Save Changes’ to submit.</li>
</ol>

Shortcode in Comment

Enables blog owners to allow some shortcodes to be used in comments. You can choose what to allow.

itthinx

Decent Comments shows what people say.
If you want to show comments along with their author’s avatars and an excerpt of their comment, then this is the right plugin for you.
And it’s not limited to just a widget showing recent comments: The plugin provides configurable widgets, shortcodes and an API to display comments in sensible ways, including author avatars, links, comment excerpts …
Anywhere you place comments, by means of a widget, a shortcode or an API call, you can:
<ul>
<li>Show an excerpt or the full comment. You can choose to not show the comment as well.</li>
<li>Determine the number of words shown for excerpts.</li>
<li>Set your kind of ellipsis.</li>
<li>Set the number of comments to show.</li>
<li>Show the author’s avatar and determine its size.</li>
<li>Sort by author email, author URL, content (what’s said in the comment), date, karma or post … in ascending or descending order.</li>
<li>Show comments for the current post or for a specific post.</li>
<li>Show comments for a specific post type.</li>
<li>Show comments for posts in specific categories, for specific tags, … (more precisely: the ability to show comments from posts related to one or more terms in a chosen taxonomy).</li>
<li>Show comments for a set of posts and/or excluding a set of posts.</li>
<li>and more to come … got suggestions?</li>
</ul>
Feedback is welcome! 
If you need help, have problems, want to leave feedback or want to provide constructive criticism, please do so here at the <a href="https://www.itthinx.com/plugins/decent-comments" rel="nofollow ugc">Decent Comments plugin page</a>.
Please try to solve problems there before you rate this plugin or say it doesn’t work. There goes a lot of work into providing you with free quality plugins! Please appreciate that and help with your feedback. Thanks!
Follow <a href="https://twitter.com/itthinx" rel="nofollow ugc">@itthinx</a> for updates on this and other plugins.
Translations
<ul>
<li>Catalan translation provided by <a href="https://www.ibidemgroup.com" rel="nofollow ugc">Ibidem Group</a></li>
<li>Chinese translation provided by Francesco from <a href="https://www.in-cina.com" rel="nofollow ugc">in Cina</a></li>
<li>French translation provided by Thomas Mur from <a href="https://www.creapage.net" rel="nofollow ugc">Creapage.net</a></li>
<li>German translation provided by the author <a href="https://www.itthinx.com" rel="nofollow ugc">itthinx</a></li>
<li>Italian translation provided by Francesco from <a href="https://www.in-cina.com" rel="nofollow ugc">in Cina</a></li>
<li>Lithuanian translation provided by Vincent G from <a href="https://www.Host1Free.com" rel="nofollow ugc">Host1Free</a></li>
<li>Portuguese translation provided by <a href="https://wordpress.org/support/profile/topcasinowagering" rel="ugc">TopCasinoWagering</a></li>
<li>Russion translation provided by <a href="https://arahis.com" rel="nofollow ugc">Igor</a></li>
<li>Spanish translation provided by <a href="https://www.itthinx.com" rel="nofollow ugc">itthinx</a> and <a href="https://www.ibidem-translations.com" rel="nofollow ugc">Ibidem Translations</a></li>
</ul>
Many thanks!

Decent Comments

Thank you

Decent Comments shows what people say. Provides widgets, shortcodes and API to display comments including author avatars, links, comment excerpts.

Shortcode in Comment vs Decent Comments