This Captcha System Plugin which can be used to provide captcha functionality through out the joomla website support Joomla Core Registration, Joomla Contact Component, Joomla Password reset or forget username and JomSocial registration and group creation. we observed that many users are annoyed by lots-and lots of spam on there Joomla based websites.

More info: http://www.joomlaxi.com/products/free-products/joomla-captcha-plugin.html
Demo: http://www.cocut.cn/register.html

Download Joomla Captcha System Plugin v1.0.19
http://www.box.net/shared/qt2otte8nu
http://rapidshare.com/files/328810452/plg_xi_captcha_v1.0.19.zip

Download Joomla Captcha System Plugin v1.0.9
http://rapidshare.com/files/321943695/joomla-captcha-plugin.rar
http://hotfile.com/dl/20921779/49aca14/joomla-captcha-plugin.rar.html

Download Joomla Captcha System Plugin v2.0
http://www.box.net/shared/v6xgrekmu8