This plugin strips the country code from links to releases on the iTunes Music Store
Beautifier provides several options to clean up WP's messy (X)HTML source code output, such as code indentation.
Description: A filter for the FeedWordPress content syndication plugin.
Add an admin strip to your WP 2.1.x blog - based on an idea by Matthew M tweaked by Brendan Borlaise.
CommentSafe is a very simple plugin which removes (X)HTML tags you specify from your comments.