Formcrafts

This add-on allows you to add Google’s reCaptcha SPAM prevention to your forms.

reCaptcha Add-On for FormCraft

Md Jahed

This plugin will enable awesome mailchimp in your wordpress theme. You can use the jeba Ajax mailchimp via shortcode in everywhere you want, even in theme files.
Wanna see how it works? Click here: http://prowpexpert.com/jeba-ajax-mailchimp/

Jeba Ajax mailchimp

Jeba Ajax mailchimp is an awesome mailchimp form to user subscription, super lightweight plugin for your wordpress website mailchimp.

reCaptcha Add-On for FormCraft vs Jeba Ajax mailchimp