Amie

This widget replaces the standard Blogroll widget, and adds the following features:
<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.

jensg

Ultimate Blogroll is a plugin which enables your visitors to submit a linktrade. Your visitors can add their own website and you can keep track of the in- and outlinks.
<pre><code>* Let your visitors add a linktrade
* Give an overview of the linktrades including the stats
* Order by different parameters
* Easily approve or discard a new linktrade
* Check for a reciprocal link
* Prevent spam with Recaptcha
* Import/export links into/from WordPress
* Handy Wizard/Installation process to get you started
* ...
</code></pre>
Now available in: English, Dutch, Spanish, Hungarian, Russian, Norwegian
Credits: 
Spanish translation: Dennis Vera (http://tuguiaweb.net) 
Hungarian translation: Nora Erdelyi (http://locoling-club.com) 
Russian translation: Nickolay Avdeev 
Norwegian translation: Rune Kristoffersen (http://www.sportsmarkedet.com )

Ultimate Blogroll

Enable your visitors to submit a linktrade and keep track of the in and outlinks. It is the ultimate link manager available.

WPW-Linkslist vs Ultimate Blogroll