ares
ares is a cross-platform, open source, multi-system emulator
...It is a descendant of earlier projects like higan and bsnes, inheriting a strong emphasis on correctness over raw performance. Unlike many emulators that prioritize speed, Ares deliberately adopts design choices that simplify code structure and improve readability, even if this results in slower execution. This makes it particularly valuable for researchers, developers, and preservationists who care about hardware accuracy and maintainability. The emulator supports multiple gaming systems and includes its own custom frameworks for GUI, threading, and hardware abstraction. ...