Spam Master is the Ultimate Spam Protection plugin that blocks new user registrations and post comments with Real Time anti-spam lists.
This plugins avoids spam actions on your website (comments and contact form if you use Contact Form 7).
Modifies the Empty Spam action in WordPress to process the spam deletion in batches instead of all at once.
Allow your visitors to attach files with their comments!
An easy to use wordpress Captcha plugin to prevent spam on your site. You can use Image Captcha to protect comments and the admin panel.
Reduces spam and troll comments by requiring commenters to answer a question.
Maybe the second-best Gallery plugin for WordPress
Users can choose to :Receive Comment Reply Notification Only: or :Receive Notification For All New Comments: or :Not Receive Any Notifications:
Plugin to reject spam. Port from same author from http://www.phpbbantispam.com Actually visits the URL from commenter to spider for spamwords.
Delete all comments from your wordpress database easily.
Simple Comment Editing for your website.
Stop spam with a fun game instead of distorted text! PlayThru works effortlessly on blog comments, registration pages, lost password forms, and more.
Replaces the default comments functionality by Facebook's Comments social plugin.
Vertical scroll recent comments wordpress plugin will scroll the recent post comment vertically (bottom to top) in the widget.
Eazyest Gallery extends WordPress media featuring folders, subfolders, comments, slideshows, ftp-upload, and many more features.
MP Spam Be Gone is the simplest, most effective Spam blocker.
Displays a preview of the user's comment as they type it.
Powerful and invisible fighter against comment spam.
Get email notifications when Facebook Comments are posted on your WordPress website.
This antispam plugin provides very simple(one-click) and powerful captcha for your blog.
Adds buttons for very simple and fast feedback to your post. Inspired by Blogger.
DoFollow Case by Case allows you to selectively apply dofollow to comments and make links in pages or posts "nofollow".
Customize the list of the post and page and the custom post type.
Add like/recommend button, also send button, and optionally use facebook comment instead of wordpress comment for your wordpress site.
This plugin removes all HTML tags, BBCode tags and links from added comments (including link to author's website)
Add the TinyMCE Visual Editor To The Comment Form in WordPress
Delete all pending comments from your database easily.
Customize and optimize comments in WordPress