Spam BLIP stops comment spam before it is posted, using DNS blacklists, existing comments marked as spam, and user defined lists.
Adds CAPTCHA anti-spam methods to WordPress on the forms for comments, registration, lost password, login, or all. For WP, WPMU, and BuddyPress.
Automatic break iframes ban the iranian spam rss reader sites.
The most advanced protection against sploggers and spam users registration, is fully WordPress,WordPress MU ,BuddyPress and bbPress 2.0 compatible
Send an email with a validate link to verify the email address before completing the submission.
ZigTrap adds a honey trap to your comments form.
Kick spam with a highly advanced email validation in comment forms, user registration and contact forms using Mailgun's Email validation service.
This plugin detects one-time email addresses (disposable email, trashmail, mailinator, 10minutemail) and helps to keep your userbase and comments clea
Provides a configurable limit on the length of comments left in the comment form, with a dynamically updated character count displayed for the user.
BuddyPress - Validate XProfile data with PCRE regular expressions.
REPLACEMENT of the original Simple Trackback Validation Plugin from Miachel. Performs a simple but very effective test on all incoming trackbacks in o
NURCaptcha inserts a reCAPTCHA on the Register Form of your site to protect it against spambots.
Adds Google’s No CAPTCHA reCAPTCHA to bbPress forms.
Spam proof contact form that emails you the message and saves it in database.
Close comments, pingbacks and trackbacks on your posts automatically at intervals set by you
Reduces spam and troll comments by requiring commenters to answer a question.
Are you frustrated by using CAPTCHAS in comments? We provide you a good and simple solution to combat bot spam and human spam without captcha or calcu
Comment spam prevention without moderation, captchas or questions
Unspam makes it harder for spammers to automatedly send spam to your blog by changing the names of the fields in the comment forms.
Confident CAPTCHA™ is a clickable, picture CAPTCHA that stops spam and malicious bots, while remaining a very easy CAPTCHA for humans to solve.
A lightweight plugin to protect email addresses from email-harvesting robots by encoding them into decimal and hexadecimal entities.
The Add new recaptcha google plugin allows you to implement a super security REcaptcha form into web forms.
Plugin to reject spam. Port from same author from http://www.phpbbantispam.com Actually visits the URL from commenter to spider for spamwords.
Adds the new google “Are you robot?” recaptcha to wp-login page, registration page, comment forms, buddypress registration page and contact form 7
To protect your Blog from automated spambots, this plugin adds invisible formfields to your comment form.
Vicomi comments is a free comment platform with a new cool, stylish graphic interface that replaces your default WordPress comment system.
Star Rating System? voting? so 90's! Say hello to the new Feelbacks vote system! A new emotional rating widget and votes tool
Asks commenters to complete a simple CAPTCHA if they don't have a previously approved comment, or if Akismet thinks their comment is spam.
Block bots without annoying captchas. Cache friendly solution with rotating keys! Blocks comment, registration, and bbpress spam. Activate and done!