WordPress.org

Why do I need this plugin? WordPress can display blogroll links in the sides on its own.

This plugin extends WordPress' blogroll links functionality by building on it, not replacing it. It enables you to show the links within the content of your WordPress Posts and WordPress Pages. It takes full advantage of the WordPress blogroll links database and management tool.

Besides social networking links, where else could this plugin be useful?

For other lists of URLs in your blog post. You can keep that list of links fresh without going back to edit your post.