Pengwin is described as 'The first Linux® distribution optimized for WSL. Based on Debian®. From open-source software startup Whitewater Foundry. Formerly known as WLinux'. There are more than 10 alternatives to Pengwin for a variety of platforms, including Linux, Windows S, Windows, BSD and Self-Hosted solutions. The best alternative is Ubuntu, which is both free and Open Source. Other great apps like Pengwin are Debian (Free, Open Source), Kubuntu (Free, Open Source), Kali Linux (Free, Open Source) and openSUSE (Free, Open Source).