This article lists software emulators.
Central processing units
ARM
ARMulator
Aemulor
QEMU
MIPS
SPIM: The OVPsim 500 mips MIPS32 emulator, can be used to develop software using virtual platforms, emulators including MIPS processors running at up to 500 MIPS for MIPS32 processors running many OSes including Linux. OVP is used to build emulators of single MIPS processors or multiple - homogeneous MP or heterogenous MP.
x86 architecture
Bochs
DOSBox
FX!32
PCem
QEMU – an opensource emulator that emulates 7 architectures including ARM, x86, MIPS, and others box86 Rosetta 2: Apple's emulator for macOS allowing to run x86_64 applications on arm64 platform
Motorola 680x0
Mac 68K emulator: For PowerPC classic Mac OS
PowerPC
PearPC
Rosetta: Apple's emulator for PowerPC processors, built into Mac OS X
WarpUP: Amiga system for PowerPC expansion cards built into MorphOS and available for AmigaOS SheepShaver: Emulates the PowerPC processor. Can run Mac OS 7 to Mac OS 9.
Computer system emulators
Full system simulators
Simics
CPU Sim: A Java application that allows the user to design and create a simple architecture and instruction set and then run programs of instructions from the set through simulation GXemul: Framework for full-system computer architecture emulation
Mobile phones and PDAs
Palm OS Emulator
Adobe Device Central
BlueStacks
Windows Subsystem for Android
Blisk (browser) touchHLE
Multi-system emulators
blueMSX: Emulates Z80 based computers and consoles
MAME: Emulates multiple arcade machines, video game consoles and computers
DAPHNE is an arcade emulator application that emulates a variety of laserdisc video games with the intent of preserving these games and making the play experience as faithful to the originals as possible. The developer calls DAPHNE the "First Ever Multiple Arcade Laserdisc Emulator" ("FEMALE"). It derives its name from Princess Daphne, the heroine of Dragon's Lair. HYPSEUS is a modern SDL2 update to the DAPHNE emulator, named after a sibling to Daphne.
Network emulators
ns-2
Cisco Packet Tracer
Router Sim
Operating system emulators
Unix
Cygwin: For Microsoft Windows, provides a POSIX environment and system libraries (contained in cygwin.dll). This does not allow one to run unaltered Linux/Unix binaries. However, it allows use of the gcc compiler collection to compile software written for these operating systems from source code.
In addition to the POSIX system, Cygwin includes a package manager that connects to a repository with 9000+ software packages. Users can optionally use Cygwin ports repository which includes >2300 (86x64) to >2700 (86x32) additional software packages not included in the RedHat-hosted repository, including many GUI applications.
The repository contains a wide range of software, including Bash (command shell and scripting environment comparable to the Windows Powershell), the GNU compiler collection with the complete tool chain. In addition, the 'usual and customary' programming languages installed with a Linux distribution, including C, C++, Python, PHP, Perl, Tcl/Tk, and Lua are available, along with multiple development libraries.
In addition to Bash, the GNU Utilities (e.g. find utilities, such as locate, find, grep) are installed by default. Hundreds of other software packages are included, many with non-POSIX Windows implementation, such as database management systems (PostgreSQL, MySQL), web servers (e.g. Apache HTTP Server), firewalls, text processing utilities, and console mode applications. In addition, there is a (reasonably stable) X.org/X11 implementation with GTK and Qt libraries. Based on these, graphic desktop managers, including GNOME, LXDE, LXQt, KDE, and others (e.g. x2go) with associated graphic user applications with variable stability and functionality.