Distros

Porteus is a fast, portable and modular live CD/USB medium based on Slackware Linux. The distribution started as a community remix of Slax, another Slackware-based live CD, with KDE 3 as the default desktop for the i486 edition and a stripped-down KDE 4 as the desktop environment for the x86_64 flavour. There are now several desktop flavours of the distribution, which include editions running Cinnamon, GNOME, KDE Plasma, LXQt, MATE, and Xfce.

Porteus Kiosk is a lightweight Gentoo-based Linux operating system which has been downscaled and confined to allow the use of one application only - the Firefox web browser. The browser has been locked down to prevent users from tampering with settings or downloading and installing software. When the kiosk boots, it automatically opens Firefox to the user's preferred home page. The browsing history is not kept, no passwords are saved, and many menu items have been disabled for increased security. When Firefox is restarted all caches are cleared and the browser reopens with a clean session. Note: Up to version 5.5.0 Porteus Kiosk was free to download and use. Version 6.0.0 and up require an on-line account to download and a paid subscription to activate.

PorteuX is a Linux distribution based on Slackware Linux, inspired by Slax and Porteus and available to the public for free. Its main goal is to be fast, small, portable (run from a thumb drive), modular and optionally immutable. It is pre-configured for basic usage, including lightweight applications for each one of the seven desktop environments (Cinnamon, GNOME, KDE Plasma, LXDE, LXQt, MATE and Xfce) available. No browser is included, but an app store is provided for downloading any of the most popular browsers, as well as other applications.

postmarketOS is an Alpine-based Linux distribution for mobile devices and desktop computers. The project offers several mobile interfaces - including GNOME Mobile, Phosh, Plasma Mobile and Simple X Mobile (Sxmo). The distribution also offers a range of popular desktop environments, window managers and Wayland compositors for x86_64 and AArch64 computers, such as COSMIC, GNOME, KDE Plasma and Sway. The project aims to provide long-term support for a range of mobile devices, key among them the Librem 5 and the PinePhone, though others, traditionally Android devices, are also supported.

Predator-OS is a Debian-based Linux distribution designed for penetration testing, ethical hacking, privacy and anonymity. It features customised KDE Plasma, LXQT, MATE and LXDE desktops with tailored menus. Predator-OS has over 1,200 pre-installed tools in 40 categories; these tools have been sourced from both Debian repositories and GitHub pages. Most kernel and user configurations are customised by default to prevent hacking attempts, to restrict non-privileged access, and to reduce the chances of an attack. Additionally, numerous built-in firewalls and defensive tools enable end-users to have full control over the system. Predator-OS also supports various privacy and security tools, and it can be run as a live medium or from a USB drive, as well as in installation mode.

PrimTux is a Debian- and Ubuntu-based distribution developed by a small team of school teachers and computer enthusiasts in educational environments. It is not intended to replace or become the main operating system of a modern computer, but an upgrade for obsolete equipment and benefiting the school or educational environment in the spirit of education.

Proxmox is a commercial company offering specialised products based on Debian GNU/Linux, notably Proxmox Virtual Environment and Proxmox Mail Gateway. Proxmox Virtual Environment is an open-source virtualisation platform for running virtual appliances and virtual machines. Proxmox Mail Gateway is a mail gateway with anti-spam and anti-virus features. The products are offered as free downloads with paid-for support and subscription options.