Tired of forms in your web application getting spammed? Captcha works but is a pain. This plugin ensures a real person is submitting the form without requiring anything from the user except that they have Javascript turned on.
This plugin uses the Hivelogic Enkoder, normally used to protect spambots from harvesting e-mail addresses, to enkode a hidden field on the form. That field is required when the user submits the form or they get an error.
To install: ./script/plugin install -x http://form-spam-protection.googlecode.com/svn/form_spam_protection/