MP Spam Be Gone is the simplest, most effective Spam blocker.
BT Captcha - simple, Bilingual, Flexible, Protect Your WP Blog Against Comment Spams
AntiBot Captcha - simple good-looking, but well-protected plugin against spam robots for your blog comments
This plugin allows you to manage tags with wpomatic.
An add-on to WP-o-Matic that creates a new author for each campaign.
Patterned after Dan Benjamin's Hivelogic enkoder, WP Emailcrypt keeps your email links safe automatically on-the-fly. No configuration.
Integrates a logic captcha to verify that the registrant is a human and not a spam bot instead of using distorted images or audio.
This is a widget based on WP-PostViews Plus plugin by Richer Yang (http://wordpress.org/extend/plugins/wp-postviews-plus). Adds a WP-PostViews Plus wi
Add new games from BigFishGames to your blog.