bsnes is a Super Nintendo / Super Famicom emulator that began development on October 14th, 2004. It focuses on performance, features, and ease of use.
bsnes currently enjoys 100% known, bug-free compatibility with the entire SNES library when configured to its most accurate settings, giving it the same accuracy level as higan. Accuracy can also optionally be traded for performance, allowing bsnes to operate more than 300% faster than higan while still remaining almost as accurate.
bsnes is fully open-source (GPLv3) with public development occurring on GitHub.
Talked with people who had helped develop this application. They did not even test the program in OSs other than 64-bit; my tests were made too considering a 64-bit OS, since the program is strictly 64-bit. For 32-bit users, consider using Snes9x as an alternative, since it is compatible with 32-bit systems and is pretty accurate.