The captchator gem provides a seamless captcha interface for Rails applications with easily readable captcha images. Thanks to captchator.com/ for the library.
Add it to your Gemfile:
gem 'captchator'
In your view
<%= captchator_tags %>
In your controller
verify_captchator # returns true or false
-or- if you would like seamless integration with your model errors you can call
save_with_captchator(@my_model)
if you have any questions, please contact me (gabeodess@gmail.com).
This project rocks and uses MIT-LICENSE.