SuperLinks replaces the standard WordPress 2.5 Links widget with a more customizable one. With 
SuperLinks you can add as many Links widgets as you want, and set the display options for each 
widget. For instance, you can set which Links category is displayed on each block.
SuperLinks was inspired by the LinkBlock plugin, which provided a very similar service. However, 
LinkBlock development stopped before WordPress 2.5, so SuperLinks was created to fill the void.
Development of SuperLinks was greatly aided by reading the source of some existing plugins. They 
are: 
* Lorna Timbah’s “Top Commentators Widget” (http://webgrrrl.net/archives/my-top-commentators-widget-quick-dirty.htm) 
* The original LinkBlock widget (LinkBlock: http://www.optera.net/projects/wordpress/linkblock/) 
* The stock WordPress widgets found in widgets.php 
Thanks to the developers of those plugins for the help their code provided!

SuperLinks v0.1

SuperLinks is a sidebar widget that gives you greater control of displaying your links and blogroll.

Enej Bajgorić

ctlt-dev

ubcdev

Aleksandar Arsovski

This plugin allows users to display their WordPress links by category through custom fields.
The following gives a step-by-step setup overview:
<ol>
<li>Enable the plugin (check the installation tab)</li>
<li>Go to the page/post where you’d like to place your links/blogroll</li>
<li>Make sure that Custom Fields are visible (on the edit page or post page click on the “Screen Options” in the top right and make sure “Custom Fields” is checked off)</li>
<li>Under CUstom fields click on the enter new link</li>
<li>Enter an ID in the “Name” field – the plugin uses the ID “display_links” as a default</li>
<li>Enter the category name of the links you’d like to display in the “Value” field</li>
<li>Click on the “Add Custom Field” button</li>
<li>Enter the following shortcode into the post content area or the widget area you prefer: <code>[links_by_cat field_id="(ID previously entered in Name field goes here)"]</code>
<ul>
<li>Note that if you used “display_links” in the Name field, you do not need to enter the “field_id” parameter in the shortcode and can simply do: <code>[links_by_cat]</code></li>
</ul>
</li>
</ol>
The shortcode also supports many other parameters for ordering and structuring your links. All parameters on the list (except “category”) found on the following page are available: https://codex.wordpress.org/Template_Tags/wp_list_bookmarks#Parameters
Other parameter example:
<pre><code>[links_by_cat orderby="rating"] -- This is an example using the orderby parameter from the list. The links will now be ordered by their rating.
</code></pre>
<h4>Added in 1.0.1:</h4>
The ability to display all categories has been added to the shortcode. Simply add: 
 [links_by_cat display_all]
Many bug fixes have also been introduced in version 1.0.1 as well, so please upgrade.
Currently, only one category is supported per Custom Field entry; however, I am looking to update the plugin soon so that it supports multiple categories.

Display Links by Category

A simple shortcode plugin for displaying links by category through custom fields.

SuperLinks v0.1 vs Display Links by Category