Windows Phone 7 has very limited options for customization. You can only choose between black and white backgrounds, and several different colors that are used throughout the phone. But now, you can do more with the looks of your Windows Phone.
If you want to customize the live tiles of your Windows Phone then you can look forward to the WizTiles app, which is available on the Windows Marketplace. The app allows you to create completely custom tiles for a whole bunch of new purposes, such as reminders, countdowns, clocks, etc.
WizTiles consists of Windows Phone 7 ‘Mango’ supported themes with Live Tile support for standard settings in Windows Phone, and they look quite beautiful with a myriad range of colors. This app not only allows you to choose from several in-built themes, but also gives you the freedom to take any picture and apply it to your tiles.
WizTiles app is available as a free download in the Windows Marketplace.