Upon activation, SpamLord eliminates the potential for automated spam comments, as well as trackback spam.
An easy to use wordpress Captcha plugin to prevent spam on your site. You can use Image Captcha to protect comments and the admin panel.
Plugin to reject spam. Port from same author from http://www.phpbbantispam.com
Actually visits the URL from commenter to spider for spamwords.
A customisable human detection plugin, that isn't annoying. Seriously.
Slider CAPTCHA is a WordPress plugin that will allow you to replace or add a CAPTCHA field to any WordPress form.
This plugin adds a reCAPTCHA form to BuddyPress registration form to keep your community spam free.
Keep spam bots out of your site without annoying Captcha codes or faulty blacklists. Enterprise spam protection for sites of all sizes.
This plugin allows you to implement Google Captcha into web forms.
Stop a lot of spambots from polluting your site by making visitors identify a custom word displayed as an image before commenting.
The most advanced protection against sploggers and spam users registration, is fully WordPress,WordPress MU ,BuddyPress and bbPress 2.0 compatible
Spam Master is the Ultimate Spam Protection plugin that blocks new user registrations and post comments with Real Time anti-spam lists.
Help combat spam registrations by forcing the user to answer a simple math sum while registering for your BuddyPress-powered site
Cognito Forms is a free online form builder that integrates seemlessly with WordPress. Create contact forms, registrations forms, surveys, and more!
Adds CAPTCHA anti-spam methods to WordPress on the forms for comments, registration, lost password, login, or all. For WP, WPMU, and BuddyPress.
Todd Lahman's comment spam blocking plugin that blocks automated spam with zero false positives.
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