FCEUX

FCEUX is the best NES emulator for Linux and the best one for Windows. It is compatible with different joysticks and has a lot of features. FCEUX is also open source and actively supported by developers.

FCEUX Emulator Features:

• Graphical interface on GTK2
• Emulation of the huge amount of mappers
• Save support
• Lots of customization
• Support for OpenGL (without video filters)
• Video filters (scale2x/3x, hx2x/3x)
• Support for custom palettes
• Game recording/playback support
• Game Genie support
• Network playback (not Kaillera)
• Playback NSF
• Support for ZIP
• Gamepad support
• Creation of screenshots