Captcha
CAPTCHA: Completely Automated Public Turing test to tell Computers and Humans Apart
SecurImages
This Captcha plugin works with any Joomla extension capable of using the Joomla core captcha plugin system. It uses the Securimage PHP CAPTCHA1 script for generating complex images and CAPTCHA codes (including math problems) to protect forms from spam and ...
PlayThru Captcha
Let your users play minigames, instead of trying to guess twisted and distorced words! This plugin brings to Joomla! the power of PlayThru captcha, created by AreYouAHuman. **** Now this plugin has become "official"!: AreYouHuman has just announce ...
EasyCalcCheck PLUS 
Protects Joomla! core forms and 3rd party extensions through the integration of anti-spam services and adds an arithmetic problem, a question, a hidden field and a time lock. Supported 3rd Party Extensions in the Joomla! 2.5 version: aiContactSafe, Alf ...
RVS reCaptcha
This plugin adds Googles reCaptcha support to JForm compatible with Joomla 1.6 and 1.7, most importantly the user registration form. All you need to get a reCaptcha is a public/private key pair from google. In order to translate this extension into you ...
Joo ReCaptcha
Joo ReCaptcha Plugin add a free ReCaptcha form on your joomla webpage for prevent abuse from non human visitors. Our Plugin is Joomla! 1.5, 1.6/1.7 & 2.5 native, is easy to setup and does not alterate original Joomla CMS code. With only few cl ...
KeyCAPTCHA
KeyCAPTCHA - CAPTCHA with social features. You may support charity funds by using KeyCAPTCHA. Unlike many other captchas, it does not require any text typing. Free Variants of Using KeyCAPTCHA: 1. Anti-spam protection. Social advertising. Monetizatio ...
n3t Seznam Captcha
Simple text CAPTCHA with optional audio form, spelled in Czech language. It includes selectable theme and inline audio player with fallback download link. This plugin wraps the seznam.cz Captcha API.
OSOLCaptcha
Aimed for non technical joomla site users who often find it hard making hacks in core code ,this plugin easily adds captcha to joomla forms for registration,contact us,reset passord and remind username. Just have to follow 3 steps. 1.install the plugi ...
Security Images
Ever been to a site where you had to register and the registration form required that you type in the same phrase that is found in a hard-to-read image? Joomla! has now this possibility thanks to my component com_securityimages. It will protect You agai ...
Core Design Captcha plugin
Guard your forms against annoying spam and stay focused on your business everyday. Be first to say goodbye to spam.
JProiCaptcha
JProiCaptcha is a user friendly secure Captcha plugin for Joomla! 3. It's Joomla! R3ADY! JProiCaptcha, allows you to protect your Joomla! 3+ forms from spammers and bots. When enabled, it renders automatically on all Joomla! system forms - user registr ...
iDCaptcha
It's alternative Joomla 2.5 captcha plugin and component. You may customize more than 50 captcha's parameters: font and background color; background image; fonts; noises.
Captcha by Ideal
Important: This plugin ONLY works with Contact Enhanced [1], Ajax Recommend [2] Ajax Contact [3] and iRecommend [4]. Multiple CAPTCHA Engine is a system plugin to produce and verify captcha images. With this new version, you will get 4 different ca ...
tinCaptcha
Another simple captcha for Joomla. It has been integrated with Joomla contact and Virtuemart registration. The component is created for easier integrating and languages installing. Captcha settings could be found in Plugin page. Please read the tutorial ...
EasyCAPTCHA_efence
efence can do the following for you: 1. Protection against spam and malicious bots that can harm your web resources: efence is an alternative to CAPTCHA which protects your website against spam and makes it fun for the user to solve challenges. It pre ...
VouchSafe
VouchSafe is an easy, effective replacement for CAPTCHAs that requires users to simply draw a line to join two objects that are related, or to circle an object that doesn't belong in a collection. VouchSafe is the only Human Interactive Proof that uses a ...
Confident CAPTCHA
Confident CAPTCHA™ is a unique, image-based CAPTCHA solution that stops spam and bots without frustrating website visitors. Tough on Bots. Easy on People. Rather than forcing people to decipher warped and distorted characters or words, Confident CAPTC ...
OSE Email Masking plugin
OSE Email masking plugin masks your email address from articles to hide it from spammers. What does the component do OSE Email Masking plugin is a modified version of Email Cloaking plugin created by Bristlecone Web Austin and the Joomla default ema ...
Ajax Math Captcha
Allows to protect all Joomla! form from spam and bots, not only with captcha. Major level of security is granted using webservices like:Project Honeypot, StopforumSpam, Botscout, Fspmalist, Spamhaus, Akismet, Defensio and Mollom. Added protection to KUNE ...
CaptchaFa
This Captcha plugin works with any Joomla extension capable of using the Joomla core captcha plugin system. It uses the CaptchaFa system from http://www.captchafa.com that uses Farsi alphabets. --------------------------------- این پلاگین کپچا بدلیل آنک ...
