EmuNations

Ares was originally Near/Byuu's last project and was subsequently continued by new developers (including Luke from Cxbx-r). That said, it's an open-source, multi-system emulator focusing mainly on accuracy and some of its exhaustive features include but are not limited to native multi-platform UI adaptive sync, dynamic rate control, save states, run-ahead, rewind or fast-forward and much more..!

BSNES core (Performance/Balanced/Accuracy)

Snes9X core (less accurate & demanding than BNES)

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RetroArch is a frontend for libretro emulator cores, game engines and even media players. It enables you to run classic games using Libretro on a wide range of computers and consoles through its unified graphical interface. Settings are also unified so configuration can be done once and applied and applied to all. It has advanced features like shaders, netplay, rewinding, next-frame response times, and more.

It can run on the usual platforms like Windows, Mac OS X and Linux, but it stands alone in that it can support far more platforms beyond just that.

• Ludo - A smaller libretro front end by only implementing the core features and by targeting less platforms but definitely shares a lot of the same core values.

• Lakka - lightweight Linux distribution for small computers like Raspberry Pi

• RArch - It incorporates Kaillera to offer the possibility to play games online. 

Mesen-S is a cross-platform SNES emulator for Windows & Linux built in C++ and C#. It's early in development and some features are still missing compared to its NES sibling but progress is coming along quickly to rival other similaire emulators. 

Noteworthy Forks

• Mesen-SXPublic is a homebrew development oriented fork since the author has currently archived the main branch. 

higan is a multi-system emulator that began development on 15 years ago! Consoles include but are not limited to Nintendo Famicom, Nintendo Super Famicom, Super Game Boy / BS-X Satellaview / Sufami Turbo, Nintendo Game Boy / Color / Advance, Sega Master System / Game Gear / Mega Drive, NEC PC Engine / NEC SuperGrafx, Bandai WonderSwan / WonderSwan Color and much more!

bsnes is a Super Nintendo Entertainment System (Super Famicom) emulator that began development in 2004 and is currently a fork of higan which focuses on performance, features, and ease of use. It has True Super Game Boy emulation, HD mode 7, MSU1 support, Low-level emulation of all SNES coprocessors, Multi-threaded PPU and a lot more features.

Noteworthy Forks

• bsnes-hd originaly brought HD Mode 7 (rendering the rotated or pseudo perspective backgrounds at higher resolutions) but now it differentiates itself with Widescreen Mode 7, true-color (24bit color), some high resolution features, and much more..

• bsnes-plus (or bsnes+) is a fork of bsnes (v073) intended to introduce some new features and improvements, though mostly aimed at debugging.

• bsnes-mt is a modified bsnes version aimed to improve it in terms of image quality, user experience, and other non-emulation quality-of-life features.

Snes9x is a portable Super Nintendo Entertainment System emulator with high game compatibility and is a good choice if you can't run more demanding alternatives. Ports and forks of Snes9x exist for many platforms. It is also available as a libretro core for RetroArch. There also a French version available here.