Easy to use classical captcha for Rails apps

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

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

Captcha form Jike API

Simple captcha based on plain text questions.

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.

wxianfeng_simple_captcha is captcha for rails,modified from simple_captcha .

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

Simple captcha

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

A simple and custom captcha for Rails3.

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.

Simple Audio Extension to Simple Captcha

API to interact with BrandCAPTCHA http://www.pontamedia.com/en/brandcaptcha/

Arithmetic Captcha

Captcha Client for YunPian.com

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

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