The Windows Subsystem for Linux (WSL) is a new Windows 10 feature that enables you to run native Linux command-line tools directly on Windows.

OSBoxes is described as 'Homepage of site that offers virtual machines (VDI & VMDK & VHD) for VirtualBox and VMware. Run VMs inside VirtualBox and VMware on any host' and is an app. There are three alternatives to OSBoxes for Windows, Linux, Web-based and Mac. The best OSBoxes alternative is Windows Subsystem for Linux, which is both free and Open Source. Other great apps like OSBoxes are BitNami Application Stacks and Turnkey Linux.
The Windows Subsystem for Linux (WSL) is a new Windows 10 feature that enables you to run native Linux command-line tools directly on Windows.

BitNami Stacks make it incredibly easy to deploy your favorite open source software. BitNami Stacks include an open source application and all of the other software necessary to run it, such as Apache, MySQL, PHP or Ruby.

TurnKey Linux provides a super simple way to deploy open source web apps/server side applications in the cloud, VM or bare metal.

os boxes is where we can download operating systems and WSL is a linux command line for windows