Generates Text Catpchas, that are 'nice' by my own personal definition!

This is a Captcha gem for Rails Applications. It drawing captcha image with C code so it no dependencies.

A captcha that uses images instead of garbled text

A gem to generate captcha pictures.

Captcha-Plugin for Rails

Rails mountable engine, that provides captcha support

Antigate (Decode captcha service) wrapper for Ruby

simple stupid captcha

It's a Rails Captcha Engine for Rails 3 applications.

Ruby port of VIT AutoCaptcha

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

Due to many unrequited complaints to the recaptcha team with regard to its unreadability for real human users, this gem offers a more readable selection of captcha images.

To help with keep the bots at bay this gem helps you easily add honeypots to forms and/or obfuscate your form field names

SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

Metabypass | Ruby-based easy implementation for solving any type of captcha by Metabypass

Ruby package for easy integration with the API of 2captcha captcha solving service to bypass recaptcha, hcaptcha, funcaptcha, geetest and solve any other captchas.

This plugin adds helpers for the YinXiangMa CAPTCHA API

RMagickCaptcha is a gem that implements captcha for using in Rails application.

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

Simple lib to generate a math_captcha to prevent spammers in form. Supports localization.