bsnes is a Super Nintendo emulator that was started on October 14th, 2004. It is maintained as an open-source community project on GitHub.
bsnes was originally started to try and provide more faithful emulation of the SNES hardware than others emulators of that time. bsnes was the first SNES emulator to achieve 100% compatibility with no known bugs, and today continues to offer the most faithful SNES emulation available.
Although the project initially started solely to emulate the Super Nintendo, starting on October 31st, 2009, bsnes began supporting additional systems, starting with the Game Boy, in order to provide Super Game Boy support.
Over time, bsnes grew to emulate more and more systems until the name became untenable, and the project was then renamed to higan on August 9th, 2012.
higan continued development as a multi-system emulator up until May 17th, 2018 when a bsnes revival project was announced, with the stated goal of creating a standalone SNES emulator that went back to bsnes' 2004 roots. At this time, bsnes was forked from higan, and the additional emulation cores were removed. A new user-interface was created, and many additional performance enhancements and features were added to the new emulator.
On February 22nd, 2019 the new bsnes software was completed and released to the public. It is still under active development to this day.