Yes there are many. Some use spacers, some use springs, and some still use springs and control arms. It really depends on what your intentions for your truck are. For looks, haulind, towing, pulling, racing, etc. Looks only, go simple and get a spacer. Functional, get a spring or spring/control arm kit. I went KORE HD Leveling kit for function. I added a heavy front bumper and move my spare to the front receiver when I haul my camper to better distribute the weight. KORE has a great reputation on this site and had many positive comments from owners. It's been installed for two weeks now. Not too difficult on the installation scale either. I'm very satisfied. Function and ride are both very good. There are other companies that make a similar product: Skyjacker, Fabtech, Rancho, Superlift to name a few. Just remember: you get what you pay for.
Hope this helps, BF