Sony releases theme creation tools in beta for Xperia line

Sony has released a tool to allow for easy creation of Xperia themes for Androids running their version of the operating system. This application installs on your computer, and when used in conjunction with an image editor (Photoshop is recommended and well-supported) allows you to customize over 300 different assets. Using custom icons, buttons and backgrounds it's now pretty easy to create your very own theme for Xperia phones and tablets.

source: androidcentral