!This plugin hasn't been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.
wp_favorites
wp_favorites allows a logged in user to favorite a tag or tags and then show only posts that have that tag or a combination of those tags
Added custom html option for what to display if a user is logged in but has no favorites
Added two conditional tags: is_favorite(), which returns true if all the tags currently being browsed are favorited, and is_multiterm(), which returns true if there are multiple tags being browsed concurrently, such as example.com/?tag=tag1,tag-2
0.5.3
Added the ability to use an inclusive or an exclusive search. That is: let your users search for posts that contain ALL selected tags (exclusive), or let them search for ALL posts that contain any selected tags (inclusive).
Added the 'View All' button, which selects all the favorites.
Requires: 2.8 or higher Compatible up to: 3.0.5 Last Updated: 2010-8-22 Downloads: 563