fceux-gui

FCEUX is a Nintendo Entertainment System (NES), Famicom, Famicom Disk System (FDS),
and Dendy emulator. It supports NTSC (USA/JPN), PAL (European), and NTSC-PAL Hybrid modes.
It supports both Windows and SDL versions for cross compatibility.

The FCEUX concept is that of an "all in one" emulator that offers accurate emulation
and the best options for both casual play and a variety of more advanced emulator
functions. For pro users, FCEUX offers tools for debugging, rom-hacking, map making,
tool-assisted movies, and Lua scripting