MAME is a multi-purpose emulation framework
BizHawk is a multi-system emulator written in C#
Emulator of x86-based machines based on PCem
DOSBox Staging is a modern continuation of DOSBox
DS emulator, sorta
Linux distribution that transforms a computers into game consoles
Qt-based Nintendo Entertaiment System emulator and NSF/NSF2/NSFe Music
Virtualization software for x86_64 hardware
The quadplay fantasy console
Experience flawless Nintendo gaming with Znes Emulator
NES emulator written in Go
Frontend arcade mame kawaks bsnes nebula megadrive snes finalburn
Emulator of the ancient 8 bit microprocessor SC/MP 2
Mesen is a cross-platform (Windows & Linux) NES/Famicom emulator
AndroidAuto headunit emulator
Atari 2600, C64, Python, 3D engines and rock'n roll
Remix OS for PC is a productivity focused, desktop version of Android.
Emulator of NES, SNES, Sega Mega Drive, GameBoy video consoles
DirectX 1-11 to OpenGL wrapper
Scriptable frontend for media applications.
Cross-platform Apple //e emulator
Emulator for subleq OISC