Luis A. Ochoa

Exclude Page and Attachment post types from search results.
<ul>
<li>Very fast execution</li>
<li>No configuration required</li>
</ul>

Exclude From Search

Exclude Page and Attachment post types from search results.

JohnnyPea

It adds extra option fields to the user profile page where user can select the categories he wants to exclude from the site. You can allow excluding from the “Home page”, “Archive pages (excluding category archives)” or “Feeds” and also you can set which categories can users select for excluding. You will find all these setting on “My Category Excluder Settings” page in your admin panel.
It is really easy to use. User just selects the categories he wants to exclude on the “Your Profile” page in “Exclude these categories from the site” section and hits the “Update Profile” button.
I am open to suggestions to improve the plugin !

My Category Excluder

This plugin allows your registered users to exclude some categories from the queries on your site.

Exclude From Search vs My Category Excluder