MinGW!

Cygwin is a Unix-like environment and command-line interface for Microsoft Windows. Cygwin provides native integration of Windows-based applications, data, and other system resources with applications, software tools, and data of the Unix-like environment.

MSYS2 is an independent rewrite of MSYS, based on modern Cygwin (POSIX compatibility layer) and MinGW-w64 with the aim of better interoperability with native Windows software.

Ready to go. Termux works directly with no rooting or setup required. At first start a minimal base system is installed automatically - you decide what to do next.

Gow (Gnu On Windows) is the lightweight alternative to Cygwin. It uses a convenient Windows installer that installs about 130 extremely useful open source UNIX applications compiled as native win32 binaries. It is designed to be as small as possible, about 10 MB, as opposed to Cygwin which can run well over 100 MB depending upon options.

Would you like to use a linux-like console on a Windows host without a lot of fuzz? Try out babun!

The project's goal is to deliver runtime, headers, and libs for developing 64 bit (x64), as well as 32 bit (x86), windows applications using gcc-4.4 or newer versions.

win-bash is a Windows port of the famous GNU bash (see GNU Bash homepage).

The most powerful Windows console command line tools and batch scripting solution available. Create batch file commands and Windows batch files that you can use every day - for everything from launching applications to serious file management and scripting. Its the command line and console environment for programmers, operations and tech support personnel. Download today, and discover how our products can help you. Try our innovative real-time backup and archiving tools that provide continuous document protection. »

PyCmd is a smart command prompt extension for Windows cmd.exe; its purpose is to emulate a few power features of UNIX shells (decent Tab-completion, persistent history, etc.) while remaining 100% compatible with the cmd.exe syntax.

TDM-GCC is a compiler suite for Windows.

The Windows SDK provides tools, compilers, headers, libraries, code samples, and a new help system that developers can use to create applications that run on Microsoft Windows.

andLinux is a complete Ubuntu Linux system running seamlessly in Windows 2000 based systems (2000, XP, 2003, Vista, 7; 32-bit versions only). AndLinux uses coLinux as its core which is confusing for many people. coLinux is a port of the Linux kernel to Windows. Although this technology is a bit like running Linux in a virtual machine, coLinux differs itself by being more of a merger of Windows and the Linux kernel and not an emulated PC, making it more efficient. Xming is used as X server and PulseAudio as sound server.andLinux is not just for development and runs almost all Linux applications without modification. »

SpeedLinux is a customized coLinux. coLinux is not a VM but it can be used in the same way. Installation of Speedlinux results in a complete LINUX System with X server running side on side with Windows on a single PC.