Slimefun is a plugin which aims to basically turn the Server into a modpack like FTB without installing a single mod. It offers everything you could possibly imagine from backpacks to even jetpacks!
Learning to use Slimefun can be a bit difficult, however they have multiple commands and GUI’s to assist you.
You can open a in game GUI simply with Solarcraft by typing /help and selecting the Slimefun.
You can also get a GUI book by typing /sf guide
In the guide, you will find a variety of different categories that you can grow in. Every item includes instructions on how to obtain it.