GregTech, created by GregoriusT, is a Mod that completely overhauls Minecraft, adding numerous Machines and Materials, as well as adjusting Recipes for existing Items in order to make them fit with its System, and to make everything work well together, compatible and exploit-free whenever possible. GregTech is meant to extend the Game by making things much less overpowered, more reasonable and adding a lot of complex Machines, as well as generally useful Utility.
GregTech Community Edition is a total rewrite of GregTech for newer versions of Minecraft made with focus on performance and balance. GregTechCE requires Code Chicken Lib to be installed.
https://minecraft.curseforge.com/projects/gregtechce