Eugen Bobrowski

Antispam let robots do so as a human can’t do.
<h4>Features include:</h4>
<ul>
<li>No captcha</li>
<li>Statistic</li>
</ul>
GitHub: https://github.com/EugenBobrowski/antispam

Antispam

My plugin

Anti-spam check the robots by behavior. No captcha. Antispam let robots do so as a human can't do.

ramon fincken

Plugin to reject spam. Port from same author from http://www.phpbbantispam.com 
Actually visits the URL from commenter to spider for spamwords. 
Also checks using StopForumSpam.com API 
Compatible with many other anti spam plugins such as Akismet 
Plugin does a lot more such as (this list does not cover all antispam functions present): 
* Count for number of web-URI’s in comment 
* Count on email, IP, URI compared with allready spammed comments 
* Checks trackbacks and pingbacks for a valid IP adres (IP visitor must be same as webserver) 
* Detailed information by email about the spammed comment. You can approve the comment later on, or blacklist the IP adres. 
* Future feature: Add hidden fields with random names 
Need PHP5 on your webserver. Does not work on PHP4 webservers.
Coding by: <a href="http://www.mijnpress.nl" rel="nofollow ugc">MijnPress.nl</a> <a href="http://twitter.com/#!/ramonfincken" rel="nofollow ugc">Twitter profile</a> <a href="https://wordpress.org/extend/plugins/profile/ramon-fincken" rel="ugc">More plugins</a>

Antispam for all fields

Plugin to reject spam. Port from same author from http://www.phpbbantispam.com Actually visits the URL from commenter to spider for spamwords.

Antispam vs Antispam for all fields