DRBImageVerification
DRBImageVerification is a simple anti-spam image verification, or "CAPTCHA", script.
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Encaps CAPTCHA
Simple but effective CAPTCHA script, tested on live forum with 200-500 visitors per day - about 4% of spam since CAPTCHA is implemented.
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Spider Trap
Spider Trap is a freeware tool which ban bad webrobots and protect your site against domain grabbing.
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Advanced Textual Confirmation: install CAPTCHA in 1 minute.
PHP Encoder provides a free encoder to protect your source code from unauthorized modification and alteration.
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Php Login Script
This is basisbyte' s php Login script.
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myPHPscripts Browserscan
Browserscan is a proxy and bot detection script.
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Securimage CAPTCHA Class
NEW VERSION!! A highly customizable PHP CAPTCHA image class for generating CAPTCHA images to prevent programs from filling out your forms.
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Image Validator
Image Validator is a GPL CAPTCHA php script to stop spam on any form: comment areas, sign-ups, shopping carts - any area of your website where you fear the evil spammers may target.
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identiPIC photo CAPTCHA
This CAPTCHA uses pictures instead of characters.
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Awarescripts.com Image Captcha
This script creates a random image captcha saves and locks the file containing the answer to it, then when it is submitted checks to make sure what the user entered and the image match.
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