With No Dock Labels you can remove the names of the icons of the applications or folders that you have on your Springboard dock.
The truth is that it is quite clean, but above all these types of modifications are essential for some themes to look good. With Winterboard (and other applications) you can also remove the names of the other applications from the Springboard.
You can download it free en Cydia.
You will find it in the BigBoss repo.
You need to have done the jailbreak.