Q4OS is a Debian stable derivative with an unusual headline feature: first-class support for the Trinity Desktop Environment, the community project that continues the classic KDE 3 interface. Trinity gives Q4OS an extremely light, old-school desktop that feels instantly familiar to long-time Windows users, and the distribution also publishes a KDE Plasma edition for those who want a modern environment on the same dependable base. The project pitches itself for productivity and professional use, emphasizing long support windows aligned with Debian's cycle and simple setup on ordinary office hardware. Its Desktop Profiler application applies software bundles in one step, and resource requirements stay low enough to keep retired machines useful. Package management is APT with deb packages. It is a sensible candidate when replacing aging Windows installations on a budget. Through OpenFactory you can open Q4OS in a browser and judge the Trinity experience for yourself.
Select a version of Q4OS to try online:
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Need Q4OS for more than a quick browser preview?
The buttons above launch an ephemeral browser VM, perfect for kicking the tires. Paid plans unlock the things you'd actually use it for:
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