Operating Systems

Browse free open source Operating Systems and projects for Linux and BSD below. Use the toggles on the left to filter open source Operating Systems by OS, license, language, programming language, and project status.

  • All-in-One Payroll and HR Platform Icon
    All-in-One Payroll and HR Platform

    For small and mid-sized businesses that need a comprehensive payroll and HR solution with personalized support

    We design our technology to make workforce management easier. APS offers core HR, payroll, benefits administration, attendance, recruiting, employee onboarding, and more.
  • Cybersecurity Management Software for MSPs Icon
    Cybersecurity Management Software for MSPs

    Secure your clients from cyber threats.

    Define and Deliver Comprehensive Cybersecurity Services. Security threats continue to grow, and your clients are most likely at risk. Small- to medium-sized businesses (SMBs) are targeted by 64% of all cyberattacks, and 62% of them admit lacking in-house expertise to deal with security issues. Now technology solution providers (TSPs) are a prime target. Enter ConnectWise Cybersecurity Management (formerly ConnectWise Fortify) — the advanced cybersecurity solution you need to deliver the managed detection and response protection your clients require. Whether you’re talking to prospects or clients, we provide you with the right insights and data to support your cybersecurity conversation. From client-facing reports to technical guidance, we reduce the noise by guiding you through what’s really needed to demonstrate the value of enhanced strategy.
  • 1
    Redo Rescue: Backup and Recovery

    Redo Rescue: Backup and Recovery

    Backup and Recovery Made Easy

    Redo Rescue Backup and Recovery can backup and restore an entire system in minutes with a point-and-click interface anyone can use. Bare metal restore to a new, blank drive and be up and running in minutes. Supports saving to and restoring from local disks or shared network drives. Selectively restore partitions and remap them to different locations on the target drive. Additional tools included for partition editing, web browsing, and more. Runs from live CD/USB; no installation needed. Website: http://redorescue.com Forum: https://sourceforge.net/p/redobackup/discussion/ GitHub: https://github.com/redorescue/redorescue Wikipedia: https://en.wikipedia.org/wiki/Redo_Backup_and_Recovery
    Leader badge
    Downloads: 1,152 This Week
    Last Update:
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  • 2
    Thinstation is a thin client linux distro using std. x86 hw. It can boot from network, pxe, syslinux, CD, floppy or flash-disk and connect to servers using VNC, RDP, XDM, SSH, Telnet, tn5250, tarentella, 2X, NX, Thinlinc, VMWare VDI or ICA.
    Leader badge
    Downloads: 652 This Week
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  • 3
    OS-uninstaller

    OS-uninstaller

    Remove any operating system in 1 click !

    See https://sourceforge.net/p/os-uninstaller/wiki
    Leader badge
    Downloads: 648 This Week
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  • 4
    IPCop Firewall

    IPCop Firewall

    Linux firewall distribution geared towards home and SOHO users.

    The IPCop Firewall is a Linux firewall distribution. It is geared towards home and SOHO users. The IPCop web-interface is very user-friendly and makes usage easy.
    Leader badge
    Downloads: 338 This Week
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  • Finance Automation that puts you in charge Icon
    Finance Automation that puts you in charge

    Tipalti delivers smart payables that elevate modern business.

    Our robust pre-built connectors and our no-code, drag-and-drop interface makes it easy and fast to automatically sync vendors, invoices, and invoice payment data between Tipalti and your ERP or accounting software.
  • 5
    Windows11-arm-iso

    Windows11-arm-iso

    Windows 11 ISO file for Arm64.

    Windows 11 ISO file for Arm64. you can run on M series Mac, Raspberry Pi 4 and later.
    Leader badge
    Downloads: 931 This Week
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  • 6

    Kernelloader

    Run Linux on the Playstation 2

    Kernelloader is a free bootloader for PS2 Linux and other Playstation 2 operating systems. Loading can be done by "Action Replay Media Player", by "memory card exploit", by "FMCB" or any other homebrew loading method. If you downloaded the latest Linux Live DVD, you need to run the online updater to be able to play Youtube videos.
    Leader badge
    Downloads: 147 This Week
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  • 7

    Antivirus Live CD

    4MLinux fork including ClamAV scanner

    Antivirus Live CD is an official 4MLinux fork including the ClamAV scanner. It's designed for users who need a lightweight live CD, which will help them to protect their computers against viruses. Ethernet, WiFi, PPP and PPPoE are supported by Antivirus Live CD to enable automatic updates of its virus signature databases. All partitions are mounted during the boot process so that they can be scanned by ClamAV. The Antivirus Live CD ISO images are fully compatible with UNetbootin, which can be used to create an easy-to-use Antivirus Live USB.
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    Downloads: 237 This Week
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  • 8
    Robolinux

    Robolinux

    MAX Privacy with Robolinux R12.12

    All 3 Robolinux Desktop versions come with new login and grub boot splash screens & LibreWolf browser which has the highest privacy! LibreWolf is a fork of Firefox so you can use its data. The Legacy Bios isos only work in VM's & Non UEFI PC's. Don't miss 50% Off 12+ price only $59.95 Expires Sept 30 2024 The 12+ Sale details Robo UNTRACKER Custom Installer FREE! Save $40 FAAST Boot Custom Installer FREE! Save $40 Backdoor security Custom Installer FREE! Save $40 12 Advanced upgrades! Privacy App installers FREE! Stealth VM for FREE! Save $40 C Drive to VM for FREE! Save $40 The UNTRACKER makes you 100% anonymous on the internet so you can stop being tracked & traced by Evil Governments & Spy Agencies! All Robolinux R12 rolling realease Legacy BIOS & UEFI versions have the newest 5.15 Linux Kernel, compilers & software libraries & applications. Each rock solid R12 version has Long Term Support through 2025 Follower of YASHUA! John Martinson Robolinux.org
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    Downloads: 130 This Week
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  • 9
    AlienVault OSSIM

    AlienVault OSSIM

    Open Source SIEM

    OSSIM, AlienVault’s Open Source Security Information and Event Management (SIEM) product, provides event collection, normalization and correlation. For more advanced functionality, AlienVault Unified Security Management (USM) builds on OSSIM with these additional capabilities: * Log management * Advanced threat detection with a continuously updated library of pre-built correlation rules * Actionable threat intelligence updates from AlienVault Labs Security Research Team * Rich analytics dashboards and data visualization
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    Downloads: 72 This Week
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  • Powerful, all-in-one identity verification, fraud prevention and compliance platform. Icon
    Powerful, all-in-one identity verification, fraud prevention and compliance platform.

    For businesses needing an automated identity verification to defeat fraud while processing customers' data quickly and securely

    iDenfy protects startups, financial institutions, gambling, streaming, ridesharing, and other digital services from identity fraud using a three-layer identity verification process. The process protects businesses from the most threatening forms of identity fraud.
  • 10
    Artica Proxy Appliance

    Artica Proxy Appliance

    Proxy Cache and Web filtering Appliance

    Artica Proxy is a system that provide a sexy Web Ajax console in order manage a full Proxy server without any technical skill and with latest Squid technology. It provide surls filtering with french Toulouse University and Artica database - over 30.000.000 websites. There are many statistics per users or categories or websites and features in order to manage Internet bandwith. It provides FireWall/QOS features. Can work in Transparent mode or connected to an Activ Directory/OpenLDAP members database.
    Downloads: 71 This Week
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  • 11
    OpenWrt

    OpenWrt

    A Linux operating system targeting embedded devices

    OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.
    Downloads: 4 This Week
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  • 12
    Katana : Multi-Boot Security Suite
    Katana packages security / ethical hacking distributions (like Backtrack, Ophcrack, & UBCD) together with portable Windows applications (like Metasploit, NMAP, Cain & Able, & Wireshark) to run off a single USB flash drive.
    Downloads: 19 This Week
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  • 13
    Syllable Desktop is a complete operating system that is easy to use, powerful, lightweight and extraordinarily fast and responsive. It has its own kernel, filesystem, GUI and applications. Syllable Server is a matching small and efficient Linux server.
    Downloads: 17 This Week
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  • 14
    MOFO Linux

    MOFO Linux

    Linux designed to defeat state censorship and surveillance.

    The mission of MOFO Linux is to give you the power to unblock any media, at your discretion, clearing the way for you to read, write, watch, listen to, debate, or collaborate beyond the reach of Big Brother. In other words, you jump the barrier, find media, and interact with people. MOFO Linux is designed for easy usage on home PCs, laptop computers, or workstations, whether installed in internet cafes anywhere the world or on the most modest of home desktop machines. It is a collection of office, multimedia, web browsing, file sharing, and internet messaging applications assisted by a collection of anonymity and anti-censorship tools. MOFO Linux contains Encrypted DNS over HTTPS, OpenVPN, Tor, Freenet, I2P, and other software tools which provide anonymous and / or secure access to the internet and circumvention of state censorship restrictions.
    Leader badge
    Downloads: 50 This Week
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  • 15
    Metamorphose Linux

    Metamorphose Linux

    Metamorphose Linux

    O Metamorphose é um sistema operacional baseado em Linux onde seu maior objetivo de ser simples, completo e com um visual agradável para usuários iniciantes ou avançados. Conta com uma das maiores compatibilidades de hardware e software da atualidade, se comparado a outras distribuições Linux.
    Downloads: 9 This Week
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  • 16
    DreamStudio by Volocian Studios
    Volocian believes first and foremost that financial status shouldn’t be a barrier to entry in multimedia content creation. Whether you want to design a product or website, record a band, remix a song, or produce a feature length movie with professional post production graphics and effects, Volocian™ wants to help, even if you’re using borrowed hardware with no previous experience. We provide affordable products and services for any budget, including cost-free solutions for education and demo purposes, while everything we do is designed with ease of use and flexibility in mind, to suit everyone from novice hobbyists to expert professionals. Wherever possible, Volocian™ relies on free, open source, and cross-platform software to prevent vendor lock-in, planned obsolescence, and software as a service licensing. While we remain pragmatic about the use of proprietary software, as we’re aware of the feature limitations of some open source solutions, free solutions are preferred.
    Downloads: 14 This Week
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  • 17
    Debian 11 Mate

    Debian 11 Mate

    Debian Bullseye with the Mate desktop environment

    EFI SUPPORT: Download the efi iso if you need efi support here: https://sourceforge.net/projects/debian-mate/files/current/ This is debian 11 mate. Built with debian tools, packages, and currently based on the stable branch (Bullseye). Here I try not to use software from outside of the debian repositories. For all intents and purposes, this is just debian paired with the mate desktop environment with a lot of hardware support taken care of. Debian mate doesn't force you into new conformancy. We use the mate desktop environment here; no gnome 4 or unity for anyone. With a start menu and a taskbar, you're good to go. This is just another decent desktop use operating system, but better. Take a good long stare at my packages (check readme.txt).
    Leader badge
    Downloads: 28 This Week
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  • 18
    Cub Linux

    Cub Linux

    Chromium + Ubuntu = Cub Linux

    The best of Chromium and Ubuntu. Cub Linux is a project to replicate the Chromium OS experience on an Ubuntu Linux base system. Cub Linux is free to download and use forever.
    Downloads: 26 This Week
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  • 19
    Clu-Linux-Live

    Clu-Linux-Live

    Various Processing and Data Rescue Tools over Wired or Wireless Networ

    This Linux Live CD provides Various Processing Command Line Utilities (Clu) and Data Rescue Tools which can be used on a Wired or Wireless Network. On Startup it prompts the user to change password, mount all filesystems available locally, start wireless network ( if wifi interface present ), start network services (samba/ssh/sftp) and present user with a console for executing various utilities i.e Text, Image, Audio, Video, Downloading etc. on their FileSystems that are mounted. Googling on Linux ( or bash ) Command Line Utility for doing xyz task, will help the user to get examples of the same. For Data Rescue, File Managers / FileZilla can be used on networked machines to access the Live CD Machine for copying data files and folders. Refer Video / Screenshot for connection parameters and downloading option. Also Pen Drives and External USB Hard Drives can be connected before startup on the live cd machine to take backups using mcfm or clonezilla. See Wiki as well
    Downloads: 24 This Week
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  • 20
    Enchantment OS

    Enchantment OS

    Linux simplified. A consumer-friendly distro, based on Debian Stable

    Version 24 Beta release for testing and evaluation. Enchantment OS is a Linux distribution, tailored for ease of use, reliability and performance. It makes stable, secure Linux software goodness more accessible to nongeeky consumers and small business owners. Based on interviews and user trials with more than 200 real-world consumers fom California to Florida, Enchantment OS has more of the features and apps that consumers need and less of the shiny nerdy stuff that they don't. Enchantment OS offers surprising performance on old and new PC hardware-- even when booted from USB flash drives. It features a familiar desktop layout and a prominent app Menu button in the lower left corner. An updated, easy-to-read, full-color paperback user book is in progress. EnchantmentOS GNU/Linux 24 (bookwormish), Beta Release for testing and evaluation: ench-24.beta.4-amd64.iso (updated 20240726 See README text on Downloads page for details.
    Downloads: 8 This Week
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  • 21
    MultiBootUSB-Live

    MultiBootUSB-Live

    Portable System for installing many Linux Distros on to a Pen drive

    This project provides a Live DVD for the multibootusb program, for installing multiple Linux Distros on to a single Pen drive and able to boot from it. This is a portable system, which does not require any installation. Video Below. This system can be started through the DVD Drive OR VirtualBox (See Below). This .iso file can also be written on to a small dedicated pen drive ( ~ 1 GB ) through this DVD's multibootusb program and further used for writing linux images on to other pen drives ( not on the same ! ) thereby making everything portable. Note: Click "+ Other Locations" on the file manager for opening local disks, while browsing for images to write through this dvd's multibootusb program. Also note that the pen drive needs to be in fat32 format for proper booting. if in other formats, for eg. ntfs, you can use the GParted program that is in this dvd, to reformat it to fat32 ( will cleanup all data ). Watch https://www.youtube.com/watch?v=CjQRkISnHQ4 before format. See Wiki
    Downloads: 12 This Week
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  • 22
    JNode is a Java New Operating system Design Effort. JNode is a simple to use and install Java operating system for personal use on modern devices. Any java application runs on it, fast and safe. See our homepage for additional information.
    Downloads: 5 This Week
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  • 23
    Life

    Life

    Linux for Education based on Ubuntu MATE

    Li-f-e: Linux for Education. A free Linux distribution for education.
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    Downloads: 15 This Week
    Last Update:
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  • 24

    MINIBIAN image for Raspberry Pi

    MINIBIAN is a MINImal RaspBIAN-based Linux image for Raspberry Pi

    The main focus is to have a small, updated and stable distribution that is fully compatible with official Raspbian image, without GUI and unneeded tools. So this image is perfect for embedded projects, or wherever you need to use all RPi resources for your specific tasks. The main advantage is that MINIBIAN has a very small footprint, boots in some seconds and uses just few of precious RPi RAM. Unlike other similar projects, MINIBIAN has not been obtained purging unneeded packages from original image, neither recompiling the source code: it’s just a customized Raspbian installation obtained from the same repository used for official RPi image. So kernel and binary files are exactely the same you will find on standard image, with the difference that MINIBIAN fit on 1GB SD Card, is fastest, and updated more often.
    Downloads: 3 This Week
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  • 25
    Live CD With Zerofree Utility i686 32Bit

    Live CD With Zerofree Utility i686 32Bit

    A Custom Puppy Linux Live CD With Zerofree Utility i686 32 Bit

    After Booting with this Live CD, just click on the CDROM icon on the Desktop, to open its folder contents, then Right Click the zerofree.sh file and Choose the "Run in Terminal" option and then follow the instructions shown on the terminal. As you may be aware, Booting with a Live CD, requires that you need to change the Boot Order on your System / Guest BIOS, quickly on startup, by pressing either F2 OR F12 OR F10 OR an equivalent key and then change the Boot Order to boot from the CDROM first. Some Hints: Puppy Linux Live CDs show some dialogs / settings window on first startup / first shutdown. Feel free to dismiss / close them, if you do not want to make any changes, to the live cd's operation, next time, on the same system. This will not affect the zerofree's work in any way. Apart from this, using the Internet Browser, built in, would require a Free Memory of 1 GB or more, for better Performance ( as it is generally a memory intensive activity )
    Downloads: 13 This Week
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