iDo8p

NOTE : This plugin is translation ready
This plugin will automatically create links from words.
If you add word on master blog, all network wil lhave the replacement else it’s just for one blog.
Based on the exelent plugin automatic seo links from Emilio (http://emilio.aesinformatica.com)
As Emilio said :
Forget to put manually your links, just choose a word and a URL and this plugin will replace all matches in the posts of your blog.
For each link, you can set:
<ul>
<li>Title</li>
<li>Target</li>
<li>Rel</li>
<li>CSS</li>
</ul>

WPMU Automatic Links

This plugin will automatically create links from words.

PiotrPress

Clearcode

This plugin adds the shortcode <code>[a]</code> to replace <code><a></code> html tag. Its primary function is to simplify internal linking. Now you don’t need to worry about changing the permalinks and correcting the appearance of the permalink in your posts/pages. You can only paste ID of post/page into the shortcode and the plugin will handle everything for you. When opening a post/page the shortcode renders the permalinks and titles of linked posts/pages based on the pasted IDs.
<h4>Usage</h4>
Basic: <code>[a {post_ID}]</code> Example: <code>[a 123]</code> Returns: <code><a href="{post_permalink}">{post_title}</a></code>
Custom link text: <code>[a {post_ID}]{link}[/a]</code> Example: <code>[a 123]Example Post[/a]</code> Returns: <code><a href="{post_permalink}">Example Post</a></code>
External link: <code>[a {url}]{link}[/a]</code> Example: <code>[a http://example.com]Example Link[/a]</code> Returns: <code><a href="http://example.com">Example Link</a></code>
Additional parameters: <code>[a {post_ID} {param_name}="{param_value}"]</code> Example: <code>[a 123 target="_blank"]</code> Returns: <code><a href="{post_permalink}" target="_blank">{post_title}</a></code>

CC-Link-Shortcode

This plugin adds the link shortcode to replace standard html tag. Its primary function is to simplify internal linking.

WPMU Automatic Links vs CC-Link-Shortcode