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.

Andrew Nacin

In WordPress 3.5, the Link Manager (which some use to build blogrolls) will 
be disabled by default. If you have links when you update, it’ll still be there. 
But you can use this plugin to ensure it will always be there, even if you 
update to a later version of WordPress or remove all of your current links.

Link Manager

Works on WP 6.1

Enables the Link Manager that existed in WordPress until version 3.5.

SuperLinks v0.1 vs Link Manager