Admin Bar Disabler allow you to disable the WP Admin Bar in 3.1+ entirely, or only for roles and capabilities which aren’t in the ‘whitelist’ or ‘blacklist’.
Admin Bar Minimizer allows you to minimize/maximize the new WordPress 3.1 admin bar at the click of a button
jQuery Drill Down iPod Menu Widget allows you to create a drill down ipod style menu from any WordPress custom menu using jQuery.
jQuery Drop Down Mega Menu Widget allows you to quickly and easily create drop down mega menus from any WordPress custom menu.
SDAC Author Search gives logged in authors the ability to do a normal site search or the ability to search their content only.
Unwanted Plugins Remover allows you to remove unwanted plugins on a WordPress core upgrade process.
Crony Cronjob Manager allows you to create and manage cronjobs in WP by running scripts, functions, and/or PHP code.
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.
Exports and Reports allows you to define custom Exports / Reports (using MySQL queries) for users by creating each export / report and defining the fields as well as custom MySQL queries to run.
Hotfix provides fixes for selected WordPress bugs, so you don’t have to wait for the next WordPress core release.
jQuery Vertical Accordion Menu Widget 2.0 allows you to easily create multiple jQuery vertical accordion menus using the custom menus function.
Theme-Check allows you to run checks on the current theme before uploading to WordPress. This plugin uses the same API and is kept more or less in sync with the WordPress.org uploader tool.