scottsm

<p>For a while, I’ve been a bit annoyed with WordPress losing pings (those automatic links on your blog when someone links to you) anytime someone links to more than one of my posts. It turns out WordPress’s comment flood prevention is getting in the way. This plugin prevents WordPress from discarding these pings.</p>


WP_PingPreserver

Prevents WordPress from eating pings that come too quickly in succession (i.e. a single post linking to more than one of your pages).

mikegogulski

<p>Pingcrawl aims to replicate WordPress.com’s “Possibly related posts” capability. It queries Google Blog Search for related blog posts (based on tags, or the post title if there are no tags), tries to verify that they are pingback/trackback compatible sites and, if so, adds links to such posts to the end of each blog post where it is invoked.</p>
<p>Scope-limiting configuration options are included to enable Pingcrawl to fit any WordPress installation’s memory/execution time budget.</p>
<h3>Licence</h3>
<p>Pingcrawl is free software released under the GPL. If you find it valuable, you’re invited to make a <a href="http://www.nostate.com/support-nostatecom/" title="Donate with PayPal, MoneyBookers, etc." rel="nofollow ugc">small donation</a> toward its ongoing support and maintenance.</p>


Pingcrawl

Pingcrawl adds a "Possibly related posts" capability by querying Google Blog Search for post tags and pinging the results.

WP_PingPreserver vs Pingcrawl