Tested with Vanilla install of 1.8.15 and the plugin is working 

Please email me ( comments left here are not reaching me )

Fully tested for 1.8.11 and is running in production

Browsers tested: Firefox, Google Chrome, Safari

Note: This plugin might not work with Walled Garden Installations

This is a plugin that allows recaptcha to be added to the user registration form

It makes use of the standard recaptcha library 

The library is located in /mod/recaptcha/lib/recaptchalib.php

In order to use this plugin, you must have the recaptcha public and private keys. You can get them for your domain here http://www.google.com/recaptcha/whyrecaptcha 

The plugin has the following features 

• Setting to enable or disable the recaptcha on the user registration page 
• Setting to input public and private recaptcha keys 
• One time recaptcha verification - if the user correctly enters the recaptcha for the first time and the form submission fails due to some other reason, then the user is not required to to fill it in again

The git repository is located at https://github.com/naveensnayak/recaptcha  If you find bugs or have feature/enhancement requests or have any questions please contact me or you can leave a comment here or at github Thanks :)