Keith S.

<p>The standard WordPress template tags used for post navigation (next_post, previous_post, next_post_link, and previous_post_link) don’t offer this functionality, leaving you with nothing returned if there isn’t a post.  This plugin changes that.</p>
<p>NOTE!!!  This plugin only works (without a hack in your template) on single post pages.</p>
<p>You can find the plugin home page (and leave comments) <a href="http://keithsolomon.net/plr/" rel="nofollow ugc">here</a>.</p>
<h3>Usage</h3>
<p>plr_[next|previous]_post_link(‘format’, ‘link’, ‘in_same_cat’, ‘excluded_categories’)</p>
<h3>Example</h3>
<p>This would show “Next Post Title →” as a link if there was a post that came after the currently-viewed post, or “next post:” as plain text if the current post is the most recent.</p>
<h3>Parameters</h3>
<p>This plugin uses the same parameters and format as the next_post and previous_post WordPress functions.  For more info on these functions, please visit the <a href="https://codex.wordpress.org/Template_Tags/next_post_link" rel="nofollow ugc">codex</a>.</p>


Post Links Redux

Display text instead of nothing if there isn't a next or previous post for the currently-displayed post.

IMPORTANT NOTES

>THIS PLUGIN IS NO  …

nateomedia

<p>WP-SNAP! (WordPress System for Navigating Alphabetized Posts) creates an alphabetical listing of post titles on a Category or Page template file. Navigation through the listings WP-SNAP! generates is accomplished using the alphabet itself. (For example, if a site visitor clicked on the letter D, any post titles that began with that letter would be showcased.) WP-SNAP! will work on any WordPress 2.5 or higher site, but is particularly useful managing glossaries, indexes, reviews, or directories.</p>
<p>WP-SNAP! offers three different navigational styles and integration with both custom permalinks and the WordPress loop. Plugin options can be managed both site-wide and on the template itself with results either restricted to one category or broadened to include child categories as well. The clever web developer should have no problem seamlessly integrating WP-SNAP! into their latest project. Options have also been added to allow the customization of css class names and the appearance of html mark-up.</p>


WP-SNAP!

WP-SNAP! (WordPress System for Navigating Alphabetized Posts) creates an user interface for navigating alphabetized post titles.

Post Links Redux vs WP-SNAP!