potatoooooo

Oculus checks your comments against the Alibaba Yundun Antispam to see if they look like spam or not and lets you review the spam it catches under your blog’s “Comments” admin screen.
Major features in Oculus 0.1 include:
<ul>
<li>When guest write comments , oculus record user behavior information such as mouse click , mouse move and so on.</li>
<li>Oculus will check the device info of guest to see if they are hacker.</li>
</ul>
PS: You’ll need an <a href="http://www.aliyun.com/product/antifraud" rel="nofollow ugc">Alibaba Yundun Appkey</a> to use it. Appkeys are free for personal blogs, with paid subscriptions available for businesses and commercial sites.

Oculus

Oculus checks your comments against the Alibaba Yundun Antispam to see if they look like spam or not.

Pippin Williamson

Modifies the Empty Spam action in WordPress to process the spam deletion in batches, allowing you to delete thousands or even hundreds of thousands of spam comments at once without killing your server.
Have you found a bug or have a suggestion or improvement you’d like to submit? This plugin is available on <a href="https://github.com/pippinsplugins/batch-comment-spam-deletion" rel="nofollow ugc">Github</a> and pull requests are welcome!

Batch Comment Spam Deletion

Modifies the Empty Spam action in WordPress to process the spam deletion in batches instead of all at once.

Oculus vs Batch Comment Spam Deletion