There exists an Open Source DOS project here: http://svardos.osdn.io/
Unfortunately no screenshots. Would be interesting to know where it differs from FreeDOS.
SvarDOS is an open-source project that is meant to integrate the best out of the currently available DOS tools, drivers and games. DOS development has been abandoned by commercial players a very long time ago, mostly during early nineties. Nowadays, it survives solely through the efforts of hobbyists and retro-enthusiasts, but this is a highly sparse and unorganized ecosystem. SvarDOS aims to collect available DOS software, package it and make it easy to find and install applications using a network-enabled package manager (like apt-get, but for DOS and able to run even on a 8086 PC).Minimalist and 8086-compatible
Once installed, SvarDOS is a minimalistic DOS system that offers only the FreeDOS kernel and the most basic tools for system administration. It is up to the user to install additional packages. Care is taken so SvarDOS remains 8086-compatible, at least in its most basic (core) configuration.