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.
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
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.[2] 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.[3]
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.
WINE: Available for most POSIX compliant (Unix-like) operating systems, such as Linux, BSD, and macOS (Darling and Darwine projects). It provides a Win32 API and cleanroom implementation of the associated functionality. In contrast to Cygwin, WINE enables the installation and use of unaltered Windows software. Considerable effort has been put into support for video games, including third-party extensions (e.g. PlayOnLinux) which provide custom Windows configurations known to work with a very large list of videogames. In addition, desktop productivity software, including MS Office, is supported. Because of the lack of dependence on the Windows registry, inclusion of statically linked libraries, and (at least in part) historic development from open source projects, portable application, such as the PortableApps platform and the 300+ available software applications which can be downloaded with it, work with little or no issues.
