monline

"The purpose of Spamicide is to prevent spam submission to any form on your Drupal web site. Spamicide adds an input field to each form then hides it with css, when spam bots fill in the field the form is discarded. The field, and matching .css file, are named in such a way as to not let on that it is a spam defeating device, and can be set by admins to almost anything they like(machine readable please). If logging is set, the log will show if and when a particular form has been compromised, and the admin can change the form's field name (and corresponding .css file) to something else."

The current stable release (v1.2) of this module for Drupal 6.x has quite a few critical bugs that prevent you from using it (ie. you can install the module, but it won't block any spam and the extra field -added by the module to your forms- will be visible). There were already a few patches uploaded by others, but I've found and fixed a number of issues myself too. I've uploaded a patched version of the full module package so users won't have to look through all the bug reports and apply all the patches one by one. Don't forget to visit your Drupal site's admin/reports/status page after you've installed the module. This is required by the module so that it can create the necessary directory in your Drupal site's files dir.

Up til now I'm quite satisfied with the result. Since I installed Spamicide, it has blocked more spam submissions than the Captcha module.