GasCraft

GasCraft is an Engineer's Toolbox addon by Emasher. It adds, as the name describes, gases to the game that function like fluids. Certain gases have different uses than other gases. Some gases can produce energy, some can be used as weapons, and some can be used to produce materials, such as Steel. GasCraft also adds socket modules for Engineer's Toolbox sockets to deal with the gases.