tomroyal

This is a simple plugin designed to cut down on automated spam registrations and the emails they produce.
The idea is simple: in order to register, users have to answer a question that’s simple for anyone reading your blog, but impossible for a script being run by a spammer.
To install, simply copy stop_registration_spam.php to your Plugins directory. Enable the plugin and an options page will appear under the WordPress Settings menu.
In the settings page, enter your question (keep it short), answer (ideally very short) and a hint to display if the user gets it wrong. Save these and they’ll be used for new registrations.
I’ve been using this plugin for a few months, and it cut spam from dozens a day to none at all. Hope you find it useful. Questions etc welcome on my blog:
http://www.tomroyal.com/blog/2012/04/09/stop-wordpress-registration-spam/
Tom

Stop Registration Spam

Stops spammy automated user registrations using a custom question.

BOLCAL

Bolcal Anti Spam is a completely free plugin that helps reduce spam registrations on WooCommerce and WordPress sites.
Features:
<ul>
<li>Advanced honeypot protection</li>
<li>Time trap</li>
<li>IP rate limiting</li>
<li>Country blocking</li>
<li>Email suffix blocking</li>
<li>Disposable email blocking</li>
<li>IP whitelist and blacklist</li>
<li>Username pattern detection</li>
<li>Manual username keyword blocking</li>
<li>Risk score based filtering</li>
<li>Registration logs in admin</li>
<li>One-click recommended security profile</li>
<li>WooCommerce and wp-login.php registration protection</li>
<li>Contact Form 7 toplama / çıkarma güvenlik sorusu</li>
<li>Contact Form 7 honeypot koruması</li>
<li>Contact Form 7 minimum doldurma süresi kontrolü</li>
<li>Contact Form 7 kısa süreli IP gönderim limiti</li>
<li>Contact Form 7 yasaklı kelime ve e-posta domain / TLD engeli</li>
</ul>

Bolcal Anti Spam

Free anti-spam protection for WooCommerce, WordPress registration forms, and Contact Form 7 forms.

Stop Registration Spam vs Bolcal Anti Spam