Q4OS

Q4OS is a Debian-based desktop Linux distribution offering a choice of a classic-style user interface (Trinity) and a modern desktop environment (KDE Plasma). The project also develops various utilities, such as Desktop Profiler and Software Center, as well as installers for third party applications. In late 2024, Q4OS started offering FreeXP and Free10, two Q4OS variants with Windows-like themes to help users migrate from unsupported Windows versions to Linux.