LoginRadius (Social Login) for WordPress enables social login on WordPress websites.
WPToFacebook lets you choose contents (manually or automatically) to be shown in one or more tabs on a Facebook Page.
Artiss Draft List displays a list of your draft and/or scheduled posts and/or pages.
Business Hours Plugin allows you to post your daily working hours and show it to your visitors in a configurable and templatable widget.
Debug Bar adds a debug menu to the admin bar that shows query, cache, and other helpful debugging information.
Exploit Scanner searches the files on your website, and the posts and comments tables of your database for anything suspicious. It also examines your list of active plugins for unusual filenames.
Hotfix provides unofficial fixes for selected WordPress bugs, so you don’t have to wait for the next WordPress core release.
Pricing Table comes with very flexible and dynamic options for creating a pricing table just in a few seconds.
Please also see WordPress 3.3 Plugin Compatibility Updates for a list of popular plugins that were updated earlier.