WP-Hashcash

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No More Spam WP Hashcash is an antispam plugin that eradicates comment spam on WordPress blogs. It works because your visitors must use obfuscated javascript to submit a proof-of-work that indicates they opened your website in a web browser, not a robot. If the javascript check fails, WP Hashcash now gives you three options; it can either put the comment into moderation (default), put the comment in the akismet queue, or delete it. You can read more at the WP Hashcash plugin page. WP Hashcash is 100% GPL compatible. Features Blocks all comment spam, but not real comments Also prevents most trackback / pingback spam Also protects signup pages for WordPress (WP), BuddyPress (BP), and WordPress Multi-User (WPMU) Widget support to display spam statistics and edit the configuration Works with IE, Firefox, and Safari 100% standards compliant XHTML 1.1, works with jQuery and Prototype Tested with Wordpres 2, Firefox, Safari, IE, and Chrome Akismet compatibility Limitations WP Hashcash relies on the presence of two hooks in your theme, wp_head and comment_form. If your theme doesn’t include these actions, you will need to add them immediately before the end head and end form tags respectively. Testimonials “One of my favorites” “this is a clever idea that I think might work well” “I haven’t had a single comment spam in my comment moderation queue for over a week now. I’m feeling the love!” “The least annoying one I have found” “this thing was a trivial install” “a fancier technique” “Comment Spam is a thing of the past, and I owe it to Spam Stopgap Extreme. If you use WordPress, I highly recommend installing this plugin. It has completely eliminated the comment spam problem I was having. I no longer need the spammer Tarpit plugin, or anything.” “Why am I not worried about comment spam anymore? Because of my awesome new blog plugin, Spam Stopgap Extreme. This baby blocks any bot trying to post to my blog. No blacklists, no moderation, no ‘spam points’, no nothing. You won’t even know that it’s working.” “I haven’t had anything to ‘deal’ with in several weeks. That’s a nice thing. I’ve also had a bunch of folks leave legitimate comments that have gotten through. It’s all good.”