Theme Manager - a free utility for Windows 7 allows users to browse and install hundreds of unofficial themes from a single easy to use interface. Neatly divided into 15 different categories - TV Series, Landscape, Celebrities, Animals, Movies, 3D, Cars, Space, Motorcycle, Cartoons, Games, Anime, Computers, Sport, and Abstract users simply need to click on a theme's icon to instantly download and apply the theme.
Managing installed themes is also very simple, just switch to "Installed Themes" tab and you have all the options to manage already installed themes including uninstallation, New themes are automatically added to the catalog.