BusyBox - BusyBox is a single binary that provides several stripped-down Unix tools in a single executable.
Termux - Terminal emulator and Linux environment for Android
Toybox (Linux command line utilities) - Toybox combines common Linux command line utilities together into a single BSD-licensed executable...
Linux Deploy - This application is open source software for quick and easy installation of the operating system...
gow - Gow (Gnu On Windows) is the lightweight alternative to Cygwin.
MSYS2 - A Cygwin-derived software distro for Windows using Arch Linux's Pacman