Peter

<p>Stop a lot of spambots from polluting your site by making visitors identify a random word displayed as an image before commenting and optionally before registering. You can customize the pool of words to display.</p>
<h4>Features</h4>
<ul>
<li>
<p>Toggle whether registered users need to enter the word</p>
</li>
<li>
<p>Random font display</p>
</li>
<li>
<p>No cookies required</p>
</li>
<li>
<p>No JavaScript required</p>
</li>
<li>
<p>Auto-generated audio for visually impaired users</p>
</li>
<li>
<p>Easy-to-read</p>
</li>
<li>
<p>No mapping of words from the code — words are used once or removed after 24 hours</p>
</li>
<li>
<p>Reminder of what was entered if you get the word wrong</p>
</li>
<li>
<p>Selective blocking of trackbacks, pingbacks</p>
</li>
<li>
<p>Easy to translate</p>
</li>
<li>
<p>Compatible with caching plugins</p>
</li>
</ul>
<h4>Negatives</h4>
<ul>
<li>
<p>Purposely no obscuring techniques so that the anti-spam word is easy to read</p>
</li>
<li>
<p>The more people who use this plugin, the more motivation for spambots to target it</p>
</li>
</ul>
<h4>Requirements</h4>
<ul>
<li>
<p>GD Library and FreeType Library (There’s a diagnostic page to tell you whether you have them installed. If needed, just ask your web host to install them!)</p>
</li>
<li>
<p>WordPress 3.2 or higher</p>
</li>
</ul>
<h4>Translations</h4>
<ul>
<li>ru_RU translation by koc</li>
<li>sk_SK translation by Patrik Žec (PATWIST) of http://patwist.com</li>
</ul>


Peter’s Custom Anti-Spam

Stop a lot of spambots from polluting your site by making visitors identify a custom word displayed as an image before commenting.

GravityKit

<p>This Gravity Forms add-on blocks spam using a non-obtrusive anti-spam measure and can email a spam report summary.</p>
<h3>Spam blocking for Gravity Forms</h3>
<p>To get started, all you need to do is activate the plugin!</p>
<h3>Is the Gravity Forms honeypot field not working for you? 🍯 🐝</h3>
<p>Zero Spam is better than the Gravity Forms anti-spam honeypot field. If you’re getting spammed, try this plugin.</p>
<h3>Use this plugin instead of reCaptcha</h3>
<p><strong>reCaptcha is user-hostile!</strong> Use this instead! Users don’t need to click stoplights, crosswalks, or bicycles when you use this plugin to stop spam.</p>
<h3>Enable or disable filtering per form</h3>
<p>If you only want the plugin for specific forms, that’s possible! The plugin adds a simple “Prevent spam using Gravity Forms Zero Spam” setting to each form (requires Gravity Forms 2.5 or newer).</p>
<h3>Spam report emails</h3>
<p>Spam summary report emails are disabled by default. Once enabled, a spam summary that includes the number of entries per-form will be sent via email.</p>
<p>Choose whether you want to be notified after the number of entries reaches a threshold (e.g. 10 spam entries) or after a certain number of days (e.g. every week). If there are no spam entries, no report will be sent.</p>
<p>Requires <a href="https://www.gravityforms.com/?partner_id=1210629&irgwc=1&utm_medium=affiliate&utm_campaign=1210629&utm_source=Katz%20Web%20Services%2C%20Inc." rel="nofollow ugc">Gravity Forms</a>.</p>
<p><em>Brought to you by <a href="https://www.gravitykit.com?utm_source=plugin&utm_campaign=zero-spam&utm_content=readme" rel="nofollow ugc">GravityKit</a>. We create essential Gravity Forms Add-Ons.</em></p>


Gravity Forms Zero Spam

It helps way more than Gravity Forms' built in features, and it's nice to try invisible options before making users deal with Captcha quizzes. :)

Appreciate this plugin a lot!

Besides its simple approach, David Walsh’s “Zero Spam” technique, it works well.

Simple and effective

An amazingly simple yet successful strategy, this plugin captures pretty much all automated spam with little chance of false positives. No need to bother people with nasty CAPTCHAs, just install this plugin enjoy the ensuing peace.

Sends automated spam to the bit bucket

Enhance your Gravity Forms to include anti-spam measures originally based on the work of David Walsh's "Zero Spam" technique.

Peter’s Custom Anti-Spam vs Gravity Forms Zero Spam