The most advanced protection against sploggers and spam users registration, is fully WordPress,WordPress MU ,BuddyPress and bbPress 2.0 compatible
To protect your Blog from automated spambots, this plugin adds invisible formfields to your comment form.
Dead simple and super lightweight anti-spambot WordPress plugin. No captcha, tricky questions or any other user interaction required at all.
cformsII is the most customizable, flexible & powerful ajax supporting contact form plugin!
No more SPAM by spiders scanning you site for email adresses. With CryptX you can hide all your email adresses, with and without a mailto-link, by con
Smart invisible captcha for wordpress comments
The AVH First Defense Against Spam plugin gives you the ability to block spammers before any content is served.
A plugin to remove all pending comments from your DB in one click.
Obfuscate email addresses to deter email harvesting spammers, while retaining the appearance and functionality of hyperlinks.
Asks commenters to complete a simple CAPTCHA if they don't have a previously approved comment, or if Akismet thinks their comment is spam.
It blocks any spams, login attempts and malicious access to the admin area posted from the specific countries, and also prevents zero-day exploit.
This plugin prevents users from commenting or viewing your website if a comment of theirs has been marked as spam.
Anti-Captcha is a transparent spam solution that does not require any end-user interaction.
Protect WordPress login, registration, comment and BuddyPress registration forms with Google's No CAPTCHA reCAPTCHA.
This plugin allows administrators to globally delete comments (spam, trash, unapproved comments), enable/disable comments on all posts.
A clean, secure, plug-&-play contact form for WordPress.
Asks the visitor making the comment to answer a simple math question. This is intended to prove that the visitor is a human being and not a spam robot
An extremely powerful antispam plugin that blocks spam-bots without annoying captcha images.
Clean up your database by deleting unused data such as 'revisions', 'drafts', optimize your database and more...
WPCommentCleaner is a very simple tool which can batch process SPAM, un-apporved and approved comments.
Sabre is an acronym for Simple Anti Bot Registration Engine. It's a set of counter measures against spam registration on your blog.
This plugin prevents spam referrer attacks by filtering your incoming traffic.
Ergänzt das Kommentarformular um datenschutzrechtliche Hinweise bei Nutzung des Plugins Akismet.
Performs a simple but very effective test on all incoming trackbacks in order to stop trackback spam.
Several types of captcha to protect your site in one easy to use plugin.
WP Anti Spam can anti automated spambots or anti spams by"comment","ip","name","email","url".
REPLACEMENT of the original Simple Trackback Validation Plugin from Miachel. Performs a simple but very effective test on all incoming trackbacks in o