This paper offers an overview of the recent progress in the simulation technology of inkjet printing. The droplet ejection process is very simple, but it is difficult to simulate in detail because of free surface, surface tension, contact angle, evaporation, bubble formation, and so on. However, by utilizing highly efficient hardware and software, the simulation has been improved significantly. Practical use of numerical simulations for better understanding of complicated phenomena and efficient development of inkjet technology become possible. There already exists a magnificent overview of the simulations of inkjet, and this paper presents other simulation examples to complement it.