WP SITES

Note: Requires WordPress 3.6 or higher
This plugin simply removes:
<ol>
<li>The Website URL Field From All Comment Forms.</li>
<li>ALL Comment Form Allowed Tags Which Attract Automated Comment Form Spam.</li>
<li>The ‘Your email address will not be published’ text which also attracts comment form bots because it includes the text ’email’.</li>
</ol>
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Stop Comment Form Spam

New WordPress 3.6 or higher plugin which removes the website url field and comment form allowed tags which attract automated comment spam.

Abhishek shukla

This plugin is the most powerfull plugin which easily put the validation on your wordpress comment form.
This plugin is compatibile with other plugin.
In this plugin need to only activate the plugin.
For more plugins, themes and WordPress support , Please visit http://www.interactiveitsolutions.com/

Advanced Comment Validation

This plugin adds wordpress comments validation to the Wordpress comment form. only need to activate the plugin than validation is working.

Stop Comment Form Spam vs Advanced Comment Validation