Ariagle

A simple plugin which help you to avoid the keyword blocking by the China Firewall.
This plugin provide three ways to protect your content. Go to the <a href="http://blog.lolily.com/wordpress-plugin-wp-no-keyword.html" rel="nofollow ugc">Plugin Home Page</a> to get more description.

WP-No-KeyWord

A simple plugin which help you to avoid the keyword blocking by the China Firewall.

CAPitalZ

This is a plugin for the FeedWordPress.
You can do complicated keyword filters using AND, OR, and NOT logics. Plugin will look for user entered keywords in post_title, and post_content
<h3>Usage</h3>
It is not disabled out of the box and you should add keywords by clicking the Add a new keyword filter. You can add as many keyword filters as you want using one or all of the logics [OR, AND, or NOT]
You can add keywords for individual feeds as well. When you select Posts under individual feeds on the Syndication menu of FeedWordPress, you’ll have the same options to add keywords.
<ul>
<li>
Keywords are not case sensitive. Enter comma seperated list of words along with your selection of logics.
</li>
<li>
Do not leave extra space between words – unless you want it. The exact spacing will be matched.
</li>
</ul>

Ada FeedWordPress Keyword Filters

Filters posts syndicated through FeedWordPress by keywords.

WP-No-KeyWord vs Ada FeedWordPress Keyword Filters