Kofi Mokome

Enhance your website’s security and user experience with humanID – the anti-bot authentication created by the Foundation for a Human Internet, a nonprofit backed by Harvard and Mozilla. With humanID, your users can enjoy anonymity and seamless access, while automated and previously blocked users are stopped in their tracks. Say goodbye to frustrating CAPTCHAs and free up to 90% of your time spent reviewing comments, all while keeping your website secure. Whether you use WordPress or not, you can easily integrate humanID with your website’s contact form, including popular plugins like Contact Form 7. 
Try humanID today and see the difference it can make for your website’s security, user experience, and your own workload
<h3>How to Contribute</h3>
The source codes can be downloaded here <a href="https://github.com/human-internet/humanid-spam-filter" rel="nofollow ugc">GitHub</a>

humanID – Anti-Spam Comment Filter || Stop junk comments & Protect your users' privacy. 100% open source.

Replace ReCAPTCHA with a faster, user-friendly solution and block spammers & bots permanently

Mark Howells-Mead

Adds a hidden field to comment forms, which will subsequently be auto-filled by spam-submitting robots. If the form 
submission contains a value, the comment will not be saved, because only robots will see the field and fill it out.
Simple!
Any form which is processed using the hook <code>comment_form_after_fields</code> (building the form HTML) and <code>preprocess_comment</code> 
(for processing the form submission) will be extended with this functionality.
This plugin doesn’t block or catch any form submissions which have been filled manually in a browser, so you may still 
receive the occasional advertising or sales message as a post or page comment. However, blocking automatically-generated 
spam messages will reduce the number of unwanted messages greatly.

Simplest comment spam catcher

Add a hidden “honeypot” field to comment forms, to help combat comment spam.

humanID – Anti-Spam Comment Filter || Stop junk comments & Protect your users' privacy. 100% open source. vs Simplest comment spam catcher