Ryan Duff

Allow admin users to switch which theme they use on your WordPress, WordPress MU, or BuddyPress site. Adds a drop down on the Admin Bar with a drop down to choose from installed themes.

Admin Bar Theme Switcher

Allow admin users to switch which theme they use on your WordPress, WordPress MU, or BuddyPress site.  Adds a drop down on the Admin Bar with a drop d …

Gary Pendergast

Advanced Automatic Updates adds extra options to WordPress’ built-in Automatic Updates feature. On top of security updates, it also supports installing major releases, plugins, themes, or even regular SVN checkouts!
If you’re working on a WordPress Multisite install, it will properly restrict the options page to your Network Admin.
While this will be useful for the vast majority of sites, please exercise caution, particularly if you have any custom themes or plugins running on your site.

Advanced Automatic Updates

Nice Plugin

Adds extra options to WordPress' built-in Automatic Updates feature.

Admin Bar Theme Switcher vs Advanced Automatic Updates