If you are used to link the ‘previous’ and ‘next’ posts on a wordpress blog using their own title, you have probably noticed how more often than not too long titles can cause broken lines, hence unpredictable results in terms of page layout.
The only workaround in wordpress so far was to replace the title of the posts with generic phrases like ‘next post’, ‘previous post’ and so on. With this plugin you can use the title of the post itself, and trim it as needed.
Features:
<ul>
<li>limits the length of the previous and next post titles to the number of characters you want</li>
<li>where necessary, truncates the title to the last space, adding three dots</li>
<li>shows the entire title of the post in the tooltip (mysteriously wordpress never considers the tooltips of the links)</li>
<li>sets the string that conditionally will appear before the link title, only if the link title itself is present (previously in wordpress you either had to add a string outside of the ‘next/previous post’ tag, thus causing it to appear in the page even if the link was not present, or you had to add the string inside the link generated by wordpress, with ugly results: for example if the string was just a simple dividing character like ‘|’)</li>
</ul>

Better Adjacent Post Links

Adds two enhanced commands to replace wordpress 'previous post' and 'next post' functions. Works with Wordpress 2.8+.

raychow

Magic Links is a WordPress plugin that offers a variety of methods to show links. You can use it to check the comments 
number of friends.
Magic Links can be inserted anywhere in the article, or displayed in the widget:
<ul>
<li>To display Magic Links in the article, insert a short code <code>[MAGIC-LINKS]</code> (case sensitive).</li>
<li>There are two ways to display Magic Links in the widget, one is insert a short code <code>[MAGIC-LINKS]</code> 
(case sensitive), and the other is use “Magic Links” Widget.</li>
</ul>
The output of Magic Links is not always updated, it updates regularly. You can use the “Update Cache” button to update 
immediately.
You can modify the following settings in the Settings page:
<ul>
<li>Link categories</li>
<li>Statistical scope</li>
<li>Sort order</li>
<li>Filtering options
<ul>
<li>Whether display private links</li>
<li>Whether display links owned by who have no comment</li>
<li>Number of links to display</li>
</ul>
</li>
<li>Output style
<ul>
<li>Output as tag cloud or unordered list</li>
</ul>
</li>
<li>Font size
<ul>
<li>Use default size or adjusted by comments number</li>
</ul>
</li>
<li>Font color
<ul>
<li>Use default color, adjusted by comments number or use random color</li>
</ul>
</li>
<li>Link behavior
<ul>
<li>Whether force links to open in a new window</li>
<li>Whether nofollow</li>
</ul>
</li>
<li>Update Recurrance</li>
</ul>

Magic Links

Magic Links is a WordPress plugin that offers a variety of methods to show links.

Better Adjacent Post Links vs Magic Links