Snes9x is a software emulator that allows users to play classic Super Nintendo Entertainment System (SNES) games on their computers. The software supports a variety of operating systems, including Windows, Linux, and macOS. It features a user-friendly interface and supports various game controllers, as well as save states and cheat codes. Additionally, Snes9x supports a wide range of SNES games, including popular titles such as Super Mario World and The Legend of Zelda: A Link to the Past.