Web Design Inspiration, Templates, and Development Blog
Here is a collection of Free CAPTCHA Sources and services which you can easily integrate into your website using JavaScript or PHP.
1. Securimage (PHP)
Securimage is an open-source free PHP CAPTCHA script for generating complex images and CAPTCHA codes to protect forms from spam and abuse. It can be easily added into existing forms on your website to provide protection from spam bots.
2. JCaptcha (Java)
JCAPTCHA stands for Java Completely Automated Public Test to tell Computers and Humans Apart. The open source Java framework for captcha definition and integration
Download Link3. jQuery AJAX PHP Captcha
Setup a working jQuery AJAX PHP Captcha in minutes. Integrated it with jQuery Validate plugin with a remote ajax request to check if the captcha is correct.
Download Link4. Captchas.net – Free CAPTCHA Service
5. Visual and Audio PHP CAPTCHA Generation Class
PhpCaptcha is a library for generating visual and audio CAPTCHAs (completely automated public Turing test to tell computers and humans apart).
6. Cool PHP CAPTCHA
7. Quick CAPTCHA 1.0 (PHP)
8. Simple Javascript CAPTCHA
9. CAPTCHA Service – Web Form Spam Protection
10. Free CAPTCHA Form-To-Email Script
11. hOOmanTest: a MooTools bot filtering “captcha” class
12. s3Capcha jQuery plugin
13. Ajax Stylish Captcha and Contact Form using JQuery and PHP
14. jQuery Real Person
15. reCaptcha style Captcha with JQuery and PHP
