WP-Biz (Ryan)

The “honeypot” technique for SPAM protection is invisible to humans, and tricks robots into filling out an invisible form field. Then, if that invisible field has been filled, the form cannot be submitted. Easy, non-instrusive SPAM protection.
No settings to set, this honeypot is added to all Formidable forms on your site, unless the user is logged in. When SPAM is suspected, the form will not be submitted and the visitor will be alerted to this fact.
Tested to work with both Formidable (free) and <a href="http://www.wpbiz.co/go/forms" rel="nofollow ugc">Formidable Pro</a> (best bet for awesome form power!)
A note to Formidable Pro users: You paid to receive extra features in the Formidable plugin. Me too, it’s well worth it. This Honeypot plugin, and Ryan (the developer) are not connected to Formidable in any way. Since this adds another very helpful feature to Formidable, I ask you to send a <a href="http://wpbiz.co/donate/" rel="nofollow ugc">donation at WPbiz.co</a> to say thanks and encourage future developemnt.

Formidable Honeypot

Add SPAM protection to your Formidable forms without annoying your visitors with Captchas, math, or other fields.

thomstark

Create email shortcodes with unique identifiers to use in your Formidable Email Notification Settings, or anywhere else in your site. Set an unlimited number of email addresses, and change them globally from one location, any time you need to. 
* The Email Shortcodes settings page can be accessed from your Formidable menu on the Admin panel. 
* Add as many email addresses as you want to each unique ID you create. Save changes and then your shortcodes will appear in a table below. When you need to change an email address, do it here, but leave the unique identifier as is, then the email address will be changed globally wherever you’ve used the shortcode. (See screenshots for clarity.) 
* Output multiple email addresses with a single identifier. 
* Use the shortcodes in your Formidable Email Notifications settings, or anywhere else in your site.
<h4>Requirements</h4>
<ul>
<li>PHP 5.3+</li>
<li>WordPress 3.5+</li>
<li>Formidable Pro</li>
</ul>

Formidable Email Shortcodes

Create shortcodes with unique identifiers to use in your Formidable Email Notification Settings. Change email addresses globally from one location.

Formidable Honeypot vs Formidable Email Shortcodes