The Nintendo's 8 bit console was Sega's biggest rival for its Master System which was a huge hit as well at the time.
Specs:
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| Mesen | Windows Linux | Open-Source | Rating: |
| High-accuracy NES Emulator | |||
| RockNES | Windows | Freeware | Rating: |
| Nice NES emulator, but a little slower than the rest. | |||
| Jnes | Windows, Android | Freeware | Rating: |
| Another good NES emulator for Windows. Requires a reasonbly fast PC. | |||
| Nestopia UE | Windows Linux | Open-Source | Rating: |
| One of the most popular NES Emulators | |||
| FCEUX | Windows | Freeware | Rating: |
| Back again, now open source, ported for Windows and much improved! | |||
| BizHawk | Windows | Open-Source | Rating: |
| Multi-system emulator designed for Tool-Assisted Speedruns (TAS) | |||
| VirtuaNES | Windows | Freeware | Rating: |
| Relatively new emulator of Japanese origin. An English version is available though! | |||
| RetroArch | Multi-platform | Open-Source | Rating: |
| Frontend for the Libretro API, effectively a multi-system emulator | |||
| Nintendulator | Windows | Free | Rating: |
| NES Emulator | |||
| Nemulator | Windows | Freeware | Rating: |
| NES Emulator | |||
| higan | Windows | Open-Source | Rating: |
| Multi-system emulator with emphasis on emulation accuracy | |||