Parrot
Parrot (formerly Parrot Security OS) is a Debian-based, security-oriented distribution featuring a collection of utilities designed for penetration testing, computer forensics, reverse engineering, hacking, privacy, anonymity and cryptography. The product, developed by Frozenbox, comes with MATE as the default desktop environment.
NebiOS
NebiOS is an Ubuntu-based desktop Linux distribution with a custom Wayland compositor called NebiDE (based on Wayfire). It features various user interface enhancements, an initial setup module called OOBE, the NebiOS App Runtime (napp-runtime) portable application format with bubblewrap containerization, improved gaming performance with Steam Proton integration, a kernel switcher for easy multi-kernel installation, and the Wine compatibility layer for running some Windows applications.