Rails Captcha

Captchas help to establish that a user is human to protect websites from bots and spam by presenting challenges that are hard to solve for computers

Low commit activity in last 3 years
There's a lot of open issues
A plugin to make the process of creating a negative captcha in Rails much less painful
A long-lived project that still receives updates
ActsAsTextcaptcha provides spam protection for Rails models with text-based logic question captchas. Questions are fetched from Rob Tuley's They can be solved easily by humans but are tough for robots to crack.
No commit activity in last 3 years
No release in over 3 years
SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.