Distros

Puppy Linux is yet another Linux distribution. What's different here is that Puppy is extraordinarily small, yet quite full-featured. Puppy boots into a ramdisk and, unlike live CD distributions that have to keep pulling stuff off the CD, it loads into RAM. This means that all applications start in the blink of an eye and respond to user input instantly. Puppy Linux has the ability to boot off a flash card or any USB memory device, CDROM, Zip disk or LS/120/240 Superdisk, floppy disks, internal hard drive. It can even use a multisession formatted CD-RW/DVD-RW to save everything back to the CD/DVD with no hard drive required at all.

Qlustar is an Ubuntu-based Linux distribution designed for setting up, managing and scaling computer clusters. Some of its main features include the Slurm workload manager for optimal resource allocation and fair distribution across the cluster, and integration of the Spack package manager. Qlustar also ships with the QluMan graphical user interface for simplified cluster configuration and monitoring.

Quarkos is a desktop Linux distribution based on Ubuntu's long-term support branch, with a choice of two user interfaces - the modern KDE Plasma desktop or the lightweight Trinity desktop environment (a fork of KDE 3.5). It is a sister project of the Debian-based Q4OS distribution.

Qubes OS is a free and open-source, security-oriented operating system for single-user desktop computing. Qubes OS leverages Xen-based virtualization to allow for the creation and management of isolated compartments called qubes. These qubes are implemented as virtual machines (VMs). This allows each component of the operating system to be isolated from other pieces, preventing compromises from spreading or information from leaking.

Quirinux is a Devuan-based Linux distribution designed for the development of animated films. The project provides tools to create an animated film using various common techniques (traditional, digital, cut-out, CGI-3D, stop motion, motion graphics) using open-source software. The distribution uses the Xfce desktop and its main features include ease of installation with the Calamares system installer, GIMP image editor that comes with a configurator tool and extra plugins, and choice of themes and desktop layouts.

Raspberry Digital Signage is an operating system designed for digital signage installations on the Raspberry Pi: it displays a full-screen browser view restricted to a specified resource. It shows web pages from an Internet, local area network or internal (SD-card contained) sources; there is no way to escape this view but rebooting the machine.

Raspberry Pi OS (formerly Raspbian) is a free operating system based on Debian GNU/Linux and optimised for the Raspberry Pi hardware (the armhf processor architecture). Raspberry Pi OS comes with over 35,000 packages, or pre-compiled software bundled in a nice format for easy installation on a Raspberry Pi. The initial build was completed in June of 2012, but the distribution continues to be active developed with an emphasis on improving the stability and performance of as many Debian packages as possible. Although Debian produces a distribution for the arm architecture, it is compatible only with versions later than the one used on the Raspberry Pi (ARMv7-A CPUs and higher vs the Raspberry Pi's ARMv6 CPU).

Raspberry Slideshow is focused on being a quick-to-set-up platform for displaying image and video files. The distribution is built for the Raspberry Pi exclusively. Insert a USB key with image/video files or a text file with image/video URIs and boot the OS: the system will display a slideshow of the media in a full-screen view using the Omxplayer.