This is mt first gem

IQ, Math Captcha

A simple image captcha gem

dongsx

A smart captcha library

Merb plugin that provides resource access rate limits and captcha'ing

This library can help you create a captcha in your terminal application, which may be damaged by a large influx of requests.

Captcha based on encyrpting and decrypting user data by mathematical operation

Repackaged visualCaptcha's backend service, including translation and minor modification. Mainly for private use. Everything still belongs to original author: emotionLoop.

Integrate the AreYouAHuman.com CAPTCHA alternative human verification into your Ruby/Rails application

A very simple rack captcha middleware via captchator.com API

Merb plugin that provides resource access rate limits and captcha'ing

This version include two important page 'Contact' and 'Register' with the 'Math-Captcha' method submit for prevent hacker attack.

Form protection with simple captcha calculations.

This plugin adds helpers for the YinXiangMa CAPTCHA API

Solve Media CAPTCHA Replacement

RedisCaptcha provides simple captcha that can be read by human.

This gem enable to use Captchme. Anti spam, Monetize captcha and Audience qualification

Helps humankind with simpler captchas

Gem that uses RuCaptcha API to solver any type of captcha