VBA Link by denopqrihg is a modified version of GBA Emulator VisualBoy Advance. VBALink now supports GBA/SP multiplayer link cable emulation and linking of up to 4 gameboy emulators.
mGBA is a new generation of Game Boy Advance emulator. The project started in April 2013 with the goal of being fast enough to run on lower end hardware than other emulators support, without sacrificing accuracy or portability. Even in the initial version, games generally played without problems. mGBA has only gotten better since then, and now boasts being the most accurate GBA emulator around.
higan is a multi-system emulator that is known for emulating its underlying hardware very accurately. It can run every SNES title ever released. It started as a SNES emulator but currently supports over 10 systems.
VBA-M is a fork from the now inactive VisualBoy Advance project, with goals to improve the capatibility and features of the emulator.
Mednafen is a portable, utilizing OpenGL and SDL, argument(command-line)-driven multi-system emulator.
VisualBoyAdvance (commonly abbreviated as VBA) is a free emulator of the Game Boy, Game Boy Color, and Game Boy Advance handheld game consoles as well as of Super Game Boy and Super Game Boy 2.
MAME is a multi-purpose emulation framework.
MAME's purpose is to preserve decades of software history. As electronic technology continues to rush forward, MAME prevents this important "vintage" software from being lost and forgotten. This is achieved by documenting the hardware and how it functions. The source code to MAME serves as this documentation. The fact that the software is usable serves primarily to validate the accuracy of the documentation (how else can you prove that you have recreated the hardware faithfully?). Over time, MAME (originally stood for Multiple Arcade Machine Emulator) absorbed the sister-project MESS (Multi Emulator Super System), so MAME now documents a wide variety of (mostly vintage) computers, video game consoles and calculators, in addition to the arcade video games that were its initial focus.