BotDetect 3 PHP CAPTCHA

BotDetect 3 PHP CAPTCHA component is designed to protect your registration, comment, and other online forms from automated spam submissions. It generates CAPTCHA images that easily tell bots and humans apart. 60 different CAPTCHA image algorithms, custom size and image format, sound support that allows access even to visually impaired! XHTML 1.1 Strict compliant. 'Developer Edition' includes FULL SOURCE CODE and ROYALTY FREE distribution rights!