A GUI is a Graphical User Interface and a BUI is a BUTT Ugly Interface. Horde rocks in all catergories except its look and mostly its about its choice of Icons.

So i have grabbed some of the best KDE icons and replaced all of the Horde icons with the appropriate KDE icon. If you wish to see a screenshot check click here. You can find the download in the File Manager on the left. All filenames are the same so you should be able to unzip this right over your Horde installation. This was done for a plesk installation so the only different should be the Horde folder being named psa-horde instead.

I would like to make a full theme in the near future once i have some more free time. This little hack seriously improves the look of horde by leaps and bounds and when i get the chance ill release my theme once i get it done too. You can download the file from here