RetroArch is a frontend for emulators, game engines and media players.
A cross-platform PSP emulator
Play! - PlayStation2 Emulator
Continuation of NetherSX2 based on AetherSX2 4248
DS emulator, sorta
Xbox 360 Emulator Research Project
Virtualization software for x86_64 hardware
Versatile Commodore Emulator
Windows 95 in Electron. Runs on macOS, Linux, and Windows
Emulator of x86-based machines based on PCem
Qt-based Nintendo Entertaiment System emulator and NSF/NSF2/NSFe Music
Portable ZX-Spectrum emulator based on UnrealSpeccy 0.37.3 by SMT
Binary Modular DataFlow Machine (BMDFM)
A multi-purpose emulation framework
Run Windows applications on Linux, BSD, Solaris, and Mac OS X
Transfer disks and disk images between the Apple II and the real world
Environment to experiment the system on simulated and real networks
Hatari is an emulator for the Atari ST, STE, TT and Falcon computers
Create your own Atari tapes