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The extensions and reviews listed in this area have been submitted by the community and their listing does not constitute or imply endorsement, recommendation, or favouring by Joomla!/OSM.

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Captcha
CAPTCHA: Completely Automated Public Turing test to tell Computers and Humans Apart

There are 10 Extensions in this Category. Add your extension here
SecureForm
Download
6 votes - 3 reviews
This plugin provide an hook for secure Joomla! and other extensions form from spam, with an accessible CAPTCHA. For components intagration take a look at AUser Maneger or AContact Manger, two events are needed to be triggered the onView for showing the verification code and onVerify to match the inputed code Compatible with Joomla! 1.5 Native
Compatible with Joomla! 1.0
Plugin plugin
GPLv2.0  |  Non-Commercial  |  http://www.alikonweb.it/451 Views: 10,285
Bigo Captcha
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10 votes - 4 reviews
A native Joomla! 1.5 captcha plugin which may be used by other components to implement a captcha mechanism to protect you from spambots. I've tested this plugin with yvComment for Joomla! 1.5. The 'homepage' and 'demo' sites are in portuguese but the component's source code is completely in english. If you need support, please use the thread in joomla forum: http://forum.joomla.org/index.php/topic,234509.0.html Compatible with Joomla! 1.5 Native
Plugin plugin
GPLv2.0  |  Non-Commercial  |  http://www.joomla.com.br Views: 14,999
reCAPTCHA Registration
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9 votes - 4 reviews
This component is a replacement for the default Registration component. The component uses reCAPTCHA (http://www.recaptcha.net) to prevent automated abuse of your site and minimize bogus registration by using a CAPATCHA to ensure only humans perform certain actions. By using reCAPTCHA instead of other CAPTCHA implementations, you are helping to digitize books. Most other implementations of CAPTCHAs block visually impaired individuals, who cannot read images of distorted text. reCAPTCHA, on the other hand, has an audio test that allows blind ... Compatible with Joomla! 1.0
Component component
Module module
GPLv2.0  |  Non-Commercial  |  http://joomlacode.org/gf/project/recaptcha/ Views: 38,095
Security Images: THE CAPTCHA engine
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45 votes - 33 reviews
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 against most spammers attempt... It is providing 5 famillies of highly configurable captchas. This component is a framework and is currently used by many others components: akobook, akocomment, Joomla! contact, login and registration, simpleboard forum, virtuemart (since version 4.1.3 and Soere ... Compatible with Joomla! 1.5 Native
Compatible with Joomla! 1.0
Component component
Module module
Plugin plugin
GPLv2.0  |  Non-Commercial  |  http://www.waltercedric.com Views: 95,145
EasyCaptcha
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13 votes - 8 reviews
EasyCaptcha provides an easy-to-use captcha engine. All captchas are written as plugins so that EasyCaptcha can be easily extended by installing a new captcha using the integrated installer. EasyCaptcha is currently supported by: - EasyComments - EasyBook 2.0 - Pony Gallery ML - ArtForms New in Version 2.0: Nativ! Joomla 1.5 support. Compatible with Joomla! 1.5 Native
Compatible with Joomla! 1.0
Component component
GPLv2.0  |  Non-Commercial  |  http://www.easy-joomla.org/ Views: 14,695
OSTWigits - Captcha
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6 votes - 2 reviews
Captcha is a system plugin to produce and verify captcha images. We use freecap lib from: http://www.puremango.co.uk/cm_php_captcha_script_113.php This is for 1.5 ONLY. Compatible with Joomla! 1.5 Native
Plugin plugin
GPLv2.0  |  Non-Commercial  |  http://www.ostlabs.com/our-software/joomla-wigits/captcha... Views: 12,909
Jollom - Enhanced Spam Protection New Hot
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4 votes - 2 reviews
Only troubling your visitors with the need of captcha entry on strong spam suspicion for ANY form provided by ANY component on your site! Crosstec is spearheading again - By utilizing one of the most amazing anti spam systems - www.mollom.com - you now can do this: * Protect all of your form using components with captchas and by monitoring the content quality only by adding a small css-like form-definition script! * Blocking 100% sure spam immediately without any chance for robots to crack a captcha (well, in that case there won't b ... Compatible with Joomla! 1.5 Native
Compatible with Joomla! 1.0
Component component
Plugin plugin
GPLv2.0  |  Non-Commercial  |  http://www.crosstec.de Views: 1,978
Mailhide reCAPTCHA for Joomla 1.5
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1 vote - 1 review
This is an update to the default email cloaking plugin provided by Joomla 1.5. Protect your email from abuse while helping to digitize books! This plugin is meant to replace the default joomla email cloaking plugin to give it an additional option for reCAPTCHA protection. without protection, you risk robots harvesting your email and inundating your inbox with spam reCAPTCHA is effective against spam robots because it uses text which OCR has trouble reading reCAPTCHA does not require javascript Since the text is from actual ... Compatible with Joomla! 1.5 Native
Plugin plugin
GPLv2.0  |  Non-Commercial  |  http://www.bristleconeweb.com/blog/mailhide-recaptcha-for... Views: 5,590
tinCaptcha
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1 vote - Write review
Another simple captcha for Joomla 1.5. I've 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 and feedback in: http://forum.joomla.org/viewtopic.php?f=46&t=291204 Changes: v0.1.x only add more some language strings. Available languages: English / Vietnamese Czech / Spanish (by jagular) Catalan (by bernat casero) Compatible with Joomla! 1.5 Native
Component component
Plugin plugin
GPLv2.0  |  Non-Commercial  |  http://joomlacode.org/gf/project/tincaptcha/ Views: 1,673
Hashcash
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1 vote - 1 review
Forcing the spammer to pay the price (computing power) before submitting rubish to Your homepage (comments, guestbook for example). The user will have to create a new cryptographic value of a hidden field (Javascript code provided) and that may take 1 to 2 seconds, but may be more with RSA 1024.... It protect forms in Joomla! by hiding cryptographics keys and is transaparently for the users Compatible with Joomla! 1.0
Component component
http://www.waltercedric.com Views: 7,483

Extension Types

Components icon  Component: mini-application to render the main page body

Modules icon  Module: renders small html blocks on any page

 Plugin: changes code behavior dynamically (renamed from mambot)

 Language: provides language translation

Tool  Tool : external application that helps with creating or managing Joomla! site

Extension Specific Plugin  Special - extension specific plugin that requires another extension to operate