Antigate (Decode captcha service) wrapper for Ruby

dongsx

A simple and fast image captcha generator that uses opencv and memcached.

Simple captcha

Anti-spam protection for your website

A captcha that uses images instead of garbled text

Helps humankind with simpler captchas

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

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

A honeypot style captcha extension for ActiveRecord. Simple one-line inclusion in the model combined with a simple form field should trap the bad guys in the molasses.

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

Ruby wrapper for Yandex.Cleanweb

Russian Post tracking toolset, consisting tracking form bot (since Russian Post is too retarded for normal API) and captcha solver/recognizer.

TrustCaptcha – Privacy-first CAPTCHA solution for Ruby. GDPR-compliant, bot protection made in Europe.

这是一个验证码生成器。基于rucaptcha。本人只是将他的源码拉下来。为我的网站进行适配。因为我不使用sesion.id

A gem to generate captcha pictures.

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

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

Display and verify arcaptcha service captcha

Antispam helps prevent spam in your Rails applications by checking against DNS blacklists and spam-prevention databases. It has two core features: (1) IP-based spam detection using Project Honey Pot to block known spammers automatically, and (2) content-based spam detection using Defendium’s mach...