Peter

Stop a lot of spambots from polluting your site by making visitors identify a random word displayed as an image before commenting and optionally before registering. You can customize the pool of words to display.
<h4>Features</h4>
<ul>
<li>
Toggle whether registered users need to enter the word
</li>
<li>
Random font display
</li>
<li>
No cookies required
</li>
<li>
No JavaScript required
</li>
<li>
Auto-generated audio for visually impaired users
</li>
<li>
Easy-to-read
</li>
<li>
No mapping of words from the code — words are used once or removed after 24 hours
</li>
<li>
Reminder of what was entered if you get the word wrong
</li>
<li>
Selective blocking of trackbacks, pingbacks
</li>
<li>
Easy to translate
</li>
<li>
Compatible with caching plugins
</li>
</ul>
<h4>Negatives</h4>
<ul>
<li>
Purposely no obscuring techniques so that the anti-spam word is easy to read
</li>
<li>
The more people who use this plugin, the more motivation for spambots to target it
</li>
</ul>
<h4>Requirements</h4>
<ul>
<li>
GD Library and FreeType Library (There’s a diagnostic page to tell you whether you have them installed. If needed, just ask your web host to install them!)
</li>
<li>
WordPress 3.2 or higher
</li>
</ul>
<h4>Translations</h4>
<ul>
<li>ru_RU translation by koc</li>
<li>sk_SK translation by Patrik Žec (PATWIST) of http://patwist.com</li>
</ul>

Peter’s Custom Anti-Spam

Stop a lot of spambots from polluting your site by making visitors identify a custom word displayed as an image before commenting.

joe031102

Chinese Comment Spam Protection asks the visitor making the comment to key in/copy a simple chinese word. This is intended to prove that the visitor is a human being but a spam robot.
Example: 成长？路 请输入“之”字
This plugin does not require JavaScript or cookies. The result of the question is being passed via a hidden field. The result is being compared with the value entered by the visitor.
Please visit <a href="http://iibetter.com/12198.html" title="Chinese Comment Spam Protection" rel="nofollow ugc">the official website</a> for further details and the latest information on this plugin.

Chinese Comment Spam Protection

Asks the visitor making the comment to key in the disappeared chinese word. This is intended to prove that the visitor is a human being but a spam rob …

Peter’s Custom Anti-Spam vs Chinese Comment Spam Protection