D'Arcy Norman

<p>A very simple mu-plugin to automatically (automattically?) insert a “Spam prevention powered by Akismet” notice (with hyperlink to Akismet.com) in the footer of each blog hosted on a WordPress Multiuser service to abide by the licensing terms of Akismet. Adds a small “Spam prevention powered by Akismet” to the footer of every blog to abide by Akismet licensing terms.</p>


Akismet Credit Inserter

Adds a small "Spam prevention powered by Akismet" to the footer of every blog to abide by Akismet licensing terms.

WPSForm

RedMoon

<p>A lightweight addon for SimpleForm plugin. No configuration required. Once activated, you will find the new “Akismet Anti-Spam” option in the Settings page within the Spam Protection tab. Ensure that before you enable this option, you have activated Akismet plugin and registered an Akismet API Key for enabling anti-spam protection. You no longer need to worry about getting spam in your contact form, since each new form submission will be filtered for spam using Akismet.</p>
<p>For more detailed information refer to the <a href="https://wordpress.org/plugins/simpleform/" rel="ugc">SimpleForm</a> plugin page.</p>
<h3>Demo</h3>
<p>You don’t know SimpleForm yet? Check out our <a href="" rel="nofollow ugc">Demo</a> and find out how it works.</p>


SimpleForm Akismet

Do you get junk emails through your contact form? This plugin for SimpleForm helps prevent spam submission.

Akismet Credit Inserter vs SimpleForm Akismet