A number of unconventional micromachining technologies are emerging that are of potential interest for microelectromechanical systems (MEMS) manufacturing. Such micromachining processes include sequential processes in which devices on a substrate are formed one at a time, which is in contrast to conventional parallel semiconductor manufacturing processes. Nevertheless, many of the serial micromachining processes, including inkjet printing technologies and laser-based processes can be highly efficient and cost competitive, especially for low- and medium-sized manufacturing volumes as well as for prototyping purposes. The technologies presented in this chapter can be categorized as additive micromachining approaches (e.g., inkjet printing) and subtractive micromachining approaches (e.g., laser ablation). This chapter discusses the more mature technologies that are already being developed in a commercial context and a number of new and emerging micromachining approaches that are still in the early research and development stage.