Simon Wheatley

This plugin removes the author names from the feeds in your site, replacing them with the title of the site. There are no options or settings screens.
Plugin development is run on the <a href="https://github.com/cftp/anonymise-feed" rel="nofollow ugc">Github repository</a>.

Anonymise Feeds

For occasions where you don't want to name a post author in the RSS feeds.

k0nsl

You can use this plugin to prevent your site from appearing in the server logs of referred pages as a referrer. The operators of the referred pages cannot see where their visitors originate from.
For example, this plugin will automatically convert all external links to this format http://anonymizer.mastrcoder.com/index.php?q=http://k0nsl.org/
This produces an anonymous link to k0nsl.org which prevents the original site from appearing as a referrer in the log files of the referred page. This will apply to all external links – except for the ones you decide to exclude.

mastrcoder anonymizer

Anonymize all your external links with the mastrcoder anonymizing service.

Anonymise Feeds vs mastrcoder anonymizer