Julian Yanover

<p>Check comments for duplicate content using Google AJAX Search API as they are published. This helps to avoid having duplicate content in your posts. It only checks approved comments that have over 50 words. The plugin searches two random strings, both 8 words length. If one of them finds an exact match, it emails you letting you know so you can check it yourself and decide if you want to delete it.</p>


No Duplicate Content in Comments

Check comments for duplicate content using Google AJAX Search API as they are published. Emails you whenever it finds a match so you can check it and  …

Free plug in by SEO Roma

<p>The Plagiarism plugin keeps you from being penalized by Google (Panda) for inadvertent duplicate content.</p>
<p>The plugin searches online for phrases in your posts that may duplicate content already on the web (even in different context or on sites you don’t know).</p>
<p>After you save a post or page click the “Check for Duplicate Content” button. Plagiarism will show a list of duplicate phrases.</p>
<p>A link is provided for every problematic phrase, showing its related search results.</p>
<p>You can also use Plagiarism to check for websites scraping your content after it’s published. Just come back to your posts, clear the Plagiarism box results and check again for duplicate content.</p>
<h4>Options Provided</h4>
<p>Several search engines are supported:<br />
* Google Search (default)<br />
* Google Blog Search<br />
* Bing Search<br />
* Bing Blog Search<br />
* Yahoo Search</p>
<p>You can also list some excluded websites (e.g. your website itself), to avoid duplicates originating from sources you own (or participate in).</p>
<p>Public and private proxies support is available.</p>
<h4>Credits</h4>
<p>The plugin initial release is based on previous work of <a href="http://webwrights.com/" title="WebwRights" rel="nofollow ugc">WebwRights</a>‘s WP Plagiarism Pal plugin.</p>
<h4>Upcoming features</h4>
<ul>
<li>Translations</li>
<li>Alerts in post/page list</li>
<li>Better option storage</li>
<li>Uninstall function</li>
<li>Restore default setting</li>
</ul>


Plagiarism

Checks your contents (posts and pages) against the web for inadvertant duplicate content before postings. Detects online copies of your older posts.

No Duplicate Content in Comments vs Plagiarism