Author Post Ratings allows a post author to assign a simple 1-5 star rating to a post, page, or custom post type, which will then be displayed on the post.
Run External Crons enables using WordPress as a cron system that would hit external URLs (ie. any URL) on a scheduled basis.
Save iGoogle Ribbon places a “Save iGoogle” ribbon on your WordPress site or network that links to the Save iGoogle campaign.
SideOffer is a sliding side tab designed to generate leads & increase conversions by displaying a highly visible call to action for your users.
BackWPup allows you to backup your WordPress database, files, and more.
Bad Behavior complements other link spam solutions by acting as a gatekeeper, preventing spammers from ever delivering their junk, and in many cases, from ever reading your site in the first place.