Growmap Anti Spambot Plugin (G.A.S.P.)

Very simple plugin that adds a client side generated checkbox to the comment form requesting that the user clicks it to prove they are not a spammer. Bots wont see it so their spam comment will be discarded.

This plugin will add a client side generated checkbox to your comment form asking users to confirm that they are not a spammer. It is a lot less trouble to click a box than it is to enter a captcha and because the box is genereated via client side javascript that bots cannot see, it should stop 99% of all automated spam bots.

A check is made that the checkbox has been checked before the comment is submitted so there’s no chance that a comment will be lost if it’s being submitted by legitimate human user.

You can get support and see this plugin in action at Growmap. It is best to download it directly from the Plugins area on your WordPress install.