Boone Gorges

This plugin adds a widget to your WPMU blog that allows the blog administrator to display a list of links from any blog on the installation. Imagine, for instance, that Josie is teaching a class in which she and each of her students have individual blogs. Josie’s got a list of important links (a class blogroll, or maybe links that are relevant to the class), and she’d like to share the links with her students. Using this plugin, her students can place a widget on their blogs that automatically pulls in a certain category of links from her blog.
At the moment, the plugin works like this: Drop the Shared Blogroll widget into one of your blog’s sidebars. You’ll need to know the blog_id of the blog from which you’ll be pulling the links. (This is the big weakness in the plugin for now. For the moment, I’ll probably add a line of code to the Dashboard that echoes the global $blog_id, so that blog owners will know their blog_id and be able to pass it along to other who want to share their links. In the future I may add autocomplete or something. If you have a suggestion, let me know.) Once you’ve entered the source blog id, the plugin automatically populates the Category dropdown list with the categories from the source blog, so if you only want to include one of the link categories you can. You can have as many shared blogroll widgets on a blog as you’d like.

Shared Blogroll

Creates a widget that pulls a category of links from any other blog on the same WPMU installation

rajivpant

xenograg

For people who maintain their Web site or blog using the WordPress blog content management system, 
blogroll-links is an open source WordPress plugin that uses WordPress’ built-in Blogroll feature and presents links to friends’ home pages and own pages on social networking sites using XFN in the links.
Features of this plugin
<ul>
<li>It can show the links by category in blog posts and WordPress Pages.</li>
<li>It uses WordPress’ standard built-in Blogroll links database. There is no hassle of another list of links to maintain.</li>
<li>It can be used to show only the links assigned to a particular category, by stating the category slug as defined in that category’s setting in WordPress.</li>
<li>It honors the Show/Hidden setting as defined for each link in WordPress.</li>
<li>It displays the link in the same window or new window, as specified for each link in WordPress.</li>
</ul>
To learn more about this plugin, please read my blog post about it titled 
<a href="http://www.rajiv.com/blog/2008/02/10/blogroll-links/" rel="nofollow ugc">Social Graphs API: WordPress Plugin: Blogroll Links</a>
Examples
See this plugin in action at the following Posts and Pages powered by WordPress:
<a href="http://www.rajiv.com/friends/" rel="nofollow ugc">www.rajiv.com/friends/</a>
The two lists, first one of links to my own pages on various social networking sites and the second one of links to some of my friends’ pages are generated by this plugin. Yes, those social networks’ logo pictures are also taken by the plugin from the WordPress standard Blogroll links. Code:
<pre><code><h3>My Pages on Social Networking Sites</h3>
</code></pre>
Syntax:
<pre><code>[blogroll-links categoryslug="rajiv-web" sortby="link_name" sortorder="desc"]
</code></pre>
Old syntax for legacy support: 
 
<pre><code><h3>Web Sites of Some People I Know</h3>
</code></pre>
Syntax:
<pre><code>[blogroll-links categoryslug="people" sortby="link_name" sortorder="desc"]
</code></pre>
<a href="http://www.rajiv.com/charity/" rel="nofollow ugc">www.rajiv.com/charity/</a>
This list of charitable organizations with brief descriptions is generated by the plugin. Code:
Syntax:
<pre><code>[blogroll-links categoryslug="charity"]
</code></pre>
<a href="http://www.rajiv.com/blog/2004/08/02/search-engines/" rel="nofollow ugc">www.rajiv.com/blog/2004/08/02/search-engines/</a>
This list of search engines is maintained as Blogroll links in WordPress. Code:
Syntax:
<pre><code>[blogroll-links categoryslug="search-engines"]
</code></pre>
<a href="http://www.rajiv.com/" rel="nofollow ugc">www.rajiv.com/</a>
The featured links shown under the “What’s featured here?” section shows the links I’ve categorized as featured in WordPress’ Blogroll links. Code:
<pre><code><a title="featured" name="featured"></a>

<h2>What's featured here?</h2>
</code></pre>
Syntax:
<pre><code>[blogroll-links categoryslug="featured" sortby="link_name" sortorder="desc"]
</code></pre>
Thanks to Dave Grega, Adam E. Falk (xenograg) for their contributions to this code.

Shared Blogroll vs Blogroll Links