Sat, 05 Jul 2008 18:58:53 -0400 http://bugs.horde.org/ticket/4566 Wider captcha support including accessible options http://pear.php.net/pepr/pepr-proposal-show.php?id=433 http://pear.php.net/pepr/pepr-proposal-show.php?id=451 http://meyerweb.com/eric/thoughts/2005/01/24/wp-gatekeeper/ http://www.gigoit.org/humanauth/ http://www.accessibilityblog.com/wp-content/uploads/2006/06/zoints.png http://www.halfbakery.com/idea/Simple_20question_20CAPTCHA Fri, 27 Oct 2006 17:22:03 -0400 http://bugs.horde.org/ticket/4566#t25340 Another possibility for agents that support javascript: client-side challenge response (request a certain calculation) Sat, 28 Oct 2006 23:38:51 -0400 http://bugs.horde.org/ticket/4566#t25400 Some code for audio captchas. Mon, 06 Nov 2006 16:09:15 -0500 http://bugs.horde.org/ticket/4566#t25799 http://www.ejeliot.com/pages/2 Mon, 02 Apr 2007 23:34:43 -0400 http://bugs.horde.org/ticket/4566#t31078 http://recaptcha.net/ Wed, 30 May 2007 13:52:32 -0400 http://bugs.horde.org/ticket/4566#t33669 http://freecodesnippet.com/articles/security/preventing-spam-on-your-website-without-using-captcha/ Wed, 24 Oct 2007 19:37:41 -0400 http://bugs.horde.org/ticket/4566#t37994 http://haacked.com/archive/2007/09/11/honeypot-captcha.aspx Fri, 26 Oct 2007 21:46:33 -0400 http://bugs.horde.org/ticket/4566#t38161 http://nedbatchelder.com/text/stopbots.html Tue, 25 Mar 2008 16:38:13 -0400 http://bugs.horde.org/ticket/4566#t44183