If you are beginning to get bored with looking at the same plain taskbar in Windows, here is a free software, with which you can add textures to the Windows 7 taskbar.
Taskbar Texturizer is a small portable application which does not even add any new entries to the Windows registry. The user interface is pretty easy to understand and provides easy access to all the settings. Use the file browser to select a base and effect texture, which can be one of the seven templates included in the package. Or you can use custom files in the PNG format.
It comes with 10+ textures and currently works only if your taskbar is set to the bottom.
Once you have decided on the image, click on Set Texture to get a new look. To get the default look back, select Restore.
If this interests you. you can download it from here.