This plugin allows theme developers to switch theme from anywhere within a WordPress installation.
BEWARE! Development dropped. It will turn into a Glitch sooner than later.
NOTICE: The version 1.1 of tSwitch makes use of the new Themes API introduced in WordPress 3.4. If you are running WordPress 3.3.2 or older, please, install tSwitch 1.0 (the features are the same). If you are upgrading, please, deactivate tSwitch 1.0 before proceeding with the installation of this update.
tSwitch lets theme developers (or, more generally, administrator users) to quickly switch theme directly from the toolbar.