Atari800 is an Atari 8-bit computer (400, 800, and XL and XE series) and Atari 5200 game system emulator for DOS, Windows, Amiga, Atari ST, Mac, and Linux/UNIX. It includes support for Atari cartridge ROMs, popular Atari disk images files, running Atari binaries directly from the host system, and accessing the host filesystem from within the emulated Atari.
DOSBox uses SDL to emulate the PC hardware required for running old DOS games. This includes a 386 processor, an S3/Trio video card with some tweaks to allow for older display hardware like the Tandy, a Sound Blaster Pro, the PC speaker, Tandy 3-sound, CMS/GameBlaster, Disney Sound Source, and MIDI. DOS emulation is integrated. It is possible to mount local directories as drives inside the emulator.
GRUB for DOS is a rebuild of the GNU GRUB boot manager for DOS, and can be run under real mode DOS. It also has many new features. It can be booted through BOOT.INI of Windows (grldr) and kexec of Linux (grub.exe). It can directly boot NTLDR (WindowsNT/2K/XP), IO.SYS (Windows9x/Me) and KERNEL.SYS (FreeDOS). The disk emulation feature is another enhancement over GNU GRUB, and can be used to run legacy DOS/Windows9x systems with floppy or hard disk images.
Gambatte is an accuracy-focused, cross-platform Game Boy and Game Boy Color emulator. It is based on hundreds of corner case hardware tests, as well as previous documentation and reverse engineering efforts. The core emulation code is contained in a separate library back-end (libgambatte) written in pure platform-independent C++. There is a GUI that uses Trolltech's Qt4 toolkit (gambatte_qt), and a simple command-line SDL front-end (gambatte_sdl). The GUI front-end contains platform-specific extensions for video, sound, and timers.
JMCE a multiple computer emulator, a simulator for 8-bit microprocessors (Intel 8080, Zilog Z80, Intel 8051, etc.) and for many of the computers based over them, such as ZX Spectrum, Altair 8800, and Z80Pack, running their original ROM and operating system. All JMCE computers can be configured programmatically or using XML. For example, it is possible connect the console of a simulated IMSAI 8080 to one TCP server or to one physical serial interface without writing even one line of code. It is also possible to change the memory for the Z80Pack computer from plain to banked memory only by editing a single XML file.