In recent years, several new water models have been published that are reparameterizations of the rigid TIP3P and TIP4P models; examples of this include TIP4P-Ew, 10 TIP4P/2005, 11 TIP4P/ , 12 TIP3P-FB, 13 TIP4P-FB, OPC, and OPC3. These new models more accurately reproduce a number of experimentally measured physical properties of water without increasing the computational cost of the simulation. Perhaps more importantly, some of the more recent models were developed using automated parameter optimization tools such as ForceBalance, making possible the systematic optimization of force fields for a wide range of molecular liquids given the availability of experimental data.