One of the most popular ways to customize your iOS device is the Springtomize tweak. With the ability to drastically modify the UI, Springtomize allows for modifications like the number of dock icons, status bar clean up, animation changes, and, my personal favorite, icon label manipulation. I absolutely hate icon labels and for several iOS generations, Springtomize saved the day.
There are a lot of questions about when the tweak will be available for the recently jailbroken iOS 9. I was able to chat with the Springtomize developer, Filippo Bigarella, this afternoon.