Nestopia is an open-source NES/Famicom emulator designed to emulate the NES hardware as accurately as possible, and is considered the most advanced NES emulator. Developed by Martin Freij
License: Open Source
Nestopia is known for its user-friendly interface and strong support for homebrew games, making it ideal for casual users. In contrast, FCEUX provides advanced debugging and cheat functionalities, catering more to developers and power users.