Amie

<p>This widget replaces the standard Blogroll widget, and adds the following features:</p>
<ul>
<li>API compatibility, so the widget matches the theme</li>
<li>Respects options set in the Links Manager Admin Panel</li>
</ul>


WPW-Linkslist

A flexible replacement for the standard links widget, for wordpress 2.0.x only.

Zack Katz

<h3>Finally, Choose Parent Categories for Link Categories</h3>
<p>One of the problems with WordPress’ built-in blogroll/bookmark functionality is that you can’t choose to create nested categories (sub-categories) for the links. This is silly, and makes the functionality nearly useless.</p>
<h4>Treat yourself to some nested blogroll categories</h4>
<p>This plugin allows link categories to have parent categories (makes link categories “hierarchical”), saving you time and maybe even <em>saving the world</em>.</p>
<p>The plugin also now includes a widget!</p>
<blockquote>
<h4>You may also be interested in:</h4>
<ul>
<li><strong><a href="https://wordpress.org/extend/plugins/rich-text-tags/" rel="ugc">Rich Text Tags</a></strong> – Enable rich text editing of tags, categories, and taxonomies. Add value to your tag & category pages and improve your website’s SEO.</li>
</ul>
</blockquote>


Hierarchical Link Categories

Convert WordPress' link categories to be hierarchical with this simple plugin.

WPW-Linkslist vs Hierarchical Link Categories