Ruby port of VIT AutoCaptcha

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

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ReCaptcha implements view helpers to generate ReCaptcha code, with the noscript counterpart, required methods that interface with the HTTP API for captcha verification, a DSL to generate a before_filter and the code to implement AJAX captcha validation.

anti-captcha is a Ruby library for recognize captcha on anti-captcha.com

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

wxianfeng_simple_captcha is captcha for rails,modified from simple_captcha .

Captcha form Jike API

Simple captcha based on plain text questions.

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

Easy to use classical captcha for Rails apps

0-9 arası sayıları kullanarak random olarak 2 sayı seçer ve yine random olarak toplama ya da çarpma yaparak sonucu verir.

Captcha generator for rails

Define questions and answers in a YAML file and validate your models with a single line of code. No more captchas or other stupid tricks.

A simple CAPTCHA implementation for Rails 5+ based on RMagick.

Arithmetic Captcha

Arithmetic Captcha

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

A Rails captcha gem that attempts to determine whether or not a user is human.

Captcha Client for YunPian.com