Best recaptcha library for Rails 3

Question

What is the best recaptcha library for Rails 3?

I found three projects: ruby recaptcha, rack recaptcha, recaptcha

Answer 1

I use this one in one of my rails 3 project and it's works like a charm

gem 'recaptcha', :require => 'recaptcha/rails', :git => 'git://github.com/rfc2822/recaptcha.git', :branch => 'rails3'

Answer 2

Maybe you like this: http://ruby-toolbox.com/categories/rails_captcha.html

Answer 3

I found that rack recaptcha is the best for me.