yehudah

A unique anti-spam solution to help you fight spam in registration, comments, forms (Contact Form 7). 
When the user comment or using contact form 7 his comments or message will not sent or be visible until 
the user will press a unique link sent to him when he submited his message.
<h4>For Example:</h4>
Think like this i’m a spammer registering to your site, after register to your site i see a message about 
the need to activate my account, if i used fake email address this address will be blocked because it’s never 
activated, if i used a real address i activated my account with success ! 
Now i would like to change my email address so i can spam without getting any messages from your site but oops 
i can’t change my email address because the plugin blocking it ! 
Ok let’s try my luck and start spam in the commnets, posting my first comment and getting a message: 
“to see the comment you must approve your comment by pressing the link in your email address”.
I think you got the idea but what would happen if i will not press it the email and the ip address will be blocked because no one press the link, if i did press the link in the second on the third time YOU as site admin can block 
his ip and email address manually in the plugin options.
Plugin Features:
<ul>
<li>User activation by email.</li>
<li>Block user from changing is email address – EVEN BY ROLE !</li>
<li>Protect from spam commnets by sending unique url approve to the user email address – EVEN BY ROLE !</li>
<li>Auto learn mode – unverify users or comments will be deleted after time interval you choose.</li>
<li>Recaptcha protection for registration.</li>
<li>Recaptcha protection for login.</li>
<li>Recaptcha protection for commnets – EVEN BY ROLE.</li>
<li>Ban user from register or comment by ip or email.</li>
<li>Customise email notification to the users.</li>
<li>Import and export option to save plugin settings.</li>
</ul>

WASP – Anti Spam

A unique anti-spam solution to help you fight spam in registration, comments, forms (Contact Form 7).

Chip Bennett

This Plugin remains compatible with the latest version of WordPress, but I am no longer keeping up with any MBP Plugins.
MaxBlogPress plugins require a two-step registration/activation process, as well as a forced opt-in to an email-list subscription, in order to use them. This plugin circumvents those requirements, enabling unrestricted use of the plugins.
Note: this plugin does not install any other plugins. If you wish to use any MaxBlogPress plugins supported by cbnet MBP Auto-Activate, you must install them separately.
Note 2: This Plugin is not an endorsement for MaxBlogPress Plugins, but rather a proof-of-concept to demonstrate why it is futile to force users to jump through Plugin-registration and email-list-subscription hoops just to use Plugin functionality. It appears that some or all of MaxBlogPress Plugins are now released under a non-GPL-compatible license that restricts code modification. Use them at your own risk.
This plugin currently supports the following MaxBlogPress plugins:
<ul>
<li>Different Posts Per Page</li>
<li>DealDotCom Widget</li>
<li>Unblockable Popup</li>
<li>Ping Optimizer</li>
<li>Stripe Ad</li>
<li>Psychic Search</li>
<li>Favicon</li>
<li>SEO Post Link</li>
<li>Banner Ads</li>
<li>Duplicate Post Checker</li>
<li>Multi Author Comment Notification</li>
<li>Optin Form Adder</li>
</ul>
This plugin now also supports the following MaxBlogPress Revived plugins:
<ul>
<li>Front Page By Category</li>
<li>AdSense Deluxe Revived</li>
<li>Flash Fader Revived</li>
<li>Links Manage Widget</li>
<li>Banner Ads</li>
<li>Ajax Post Listing</li>
<li>Random Image</li>
<li>Access By Category</li>
<li>Captcha For Comment</li>
<li>Affiliate Image Tracker</li>
<li>Image Organizer</li>
<li>Easy Custom Fields</li>
<li>Post Ordering</li>
<li>Post Image</li>
<li>Post List By Category</li>
<li>Exerpt Listing</li>
</ul>

cbnet MBP Auto-Activate

Automatically activate MaxBlogPress plugins, without registering and without subscribing to the MaxBlogPress email list.

WASP – Anti Spam vs cbnet MBP Auto-Activate