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TheCAPTCHA - a powerful php script to protect your site against spambots. Free and open-source. Easy to install

Picture of a postage stamp issued to commemorate his many works with Biblical and Jewish themes, including the opera "David."

Provides an open source antispam plug-in for Movable Type and WordPress.

Paper by Rich Gossweiler, Maryam Kamvar, and Shumeet Baluja describing an investigation into a new type of CAPTCHA based on asking users to say which way up an ...

EVIL Ltd is focused on helping you to exploit the Opportunities associated with exploiting Virtual Intelligent Agents, and Multi Agent Systems featuring Emergent ...

A free open-source PHP CAPTCHA script for generating complex CAPTCHA images and audio files. Easy to integrate and customize.

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