Protect your email address from spam bots. In other words "fool the bots". With the "nospam" short code, you can call the function
Enhance your Gravity Forms to include anti-spam measures originally based on the work of David Walsh's "Zero Spam" technique.
Add Google's reCAPTCHA to any custom form.
The plugin sends an email message when a comment goes to the spam folder.
A lightweight plugin to protect email addresses from email-harvesting robots by encoding them into decimal and hexadecimal entities.
Zero Spam makes blocking spam comments a cinch. Install, activate and enjoy a spam-free site.
Very light invisible method to block auto-spam when spam comment is posted. Pings and trackbacks cheks for real backlink.
Bad Behavior prevents spammers from ever delivering their junk, and in many
cases, from ever reading your site in the first place.
Integrates reCAPTCHA anti-spam methods with WordPress including comment and registration spam protection.
Comment Spam Prevention without CAPTCHA. No CAPTCHA, No SPAM!
The fight against spam in comments by free service Yandex .NET Web
Simple Ajax Chat displays a fully customizable Ajax-powered chat box anywhere on your site.
WPshore Contact Form 7 Spam Prevention helps you manage your Inbox to keep it free of unwanted e-mail messages.
Blue Captcha is a powerful and highly customized WordPress plugin that effectively protects your WP blogs from spammers and unwanted persons.
Plugin to reject spam. Port from same author from http://www.phpbbantispam.com
Actually visits the URL from commenter to spider for spamwords.
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