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

  • Vibes don’t ship, Retool does Icon
    Vibes don’t ship, Retool does

    Start from a prompt and build production-ready apps on your data—with security, permissions, and compliance built in.

    Vibe coding tools create cool demos, but Retool helps you build software your company can actually use. Generate internal apps that connect directly to your data—deployed in your cloud with enterprise security from day one. Build dashboards, admin panels, and workflows with granular permissions already in place. Stop prototyping and ship on a platform that actually passes security review.
    Build apps that ship
  • Atera all-in-one platform IT management software with AI agents Icon
    Atera all-in-one platform IT management software with AI agents

    Ideal for internal IT departments or managed service providers (MSPs)

    Atera’s AI agents don’t just assist, they act. From detection to resolution, they handle incidents and requests instantly, taking your IT management from automated to autonomous.
    Learn More
  • 1
    VBA-M

    VBA-M

    A merge of the original Visual Boy Advance forks

    The continuing development of the legendary VBA gameboy advance emulator.
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    Downloads: 250 This Week
    Last Update:
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  • 2
    PearPC - PowerPC Emulator
    PearPC is an architecture independent PowerPC platform emulator capable of running most PowerPC operating systems. It includes a JITC for x86-Processors.
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    Downloads: 169 This Week
    Last Update:
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  • 3
    Tool for controlling the special features of a "U3 smart drive" USB Flash disk.
    Downloads: 67 This Week
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  • 4
    JDiskMark

    JDiskMark

    Java Disk Benchmark Utility

    JDiskMark is a powerful and versatile disk benchmarking tool written in Java, designed to help you accurately measure the performance of your storage devices across different operating systems. Whether you're testing HDDs, SSDs, or network drives, JDiskMark provides reliable insights into your disk's read and write speeds. ubuntu/debian installer: https://sourceforge.net/projects/jdiskmark/files/jdiskmark_0.6.3_amd64.deb/download rhel / fedora installer: https://sourceforge.net/projects/jdiskmark/files/jdiskmark-0.6.3-1.x86_64.rpm/download windows installer: https://sourceforge.net/projects/jdiskmark/files/jdiskmark-0.6.3.msi/download note: running with elevated privileges allow jdiskmark to automate clearing of the disk cache. ZIP releases require java to be installed separately: * v0.6.3 > jdk25 * v0.5.0-v0.6.2 >jdk21 * v0.1-v0.4 > Java 8 user manual: https://github.com/JDiskMark/jdm-java/wiki/0.6.0-User-Manual feedback welcome: support@jdiskmark.net
    Downloads: 7 This Week
    Last Update:
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  • Find Hidden Risks in Windows Task Scheduler Icon
    Find Hidden Risks in Windows Task Scheduler

    Free diagnostic script reveals configuration issues, error patterns, and security risks. Instant HTML report.

    Windows Task Scheduler might be hiding critical failures. Download the free JAMS diagnostic tool to uncover problems before they impact production—get a color-coded risk report with clear remediation steps in minutes.
    Download Free Tool
  • 5
    GPU,  a Global Processing Unit

    GPU, a Global Processing Unit

    A framework for distributed computing

    An extensible framework for distributed computing on P2P grids. We support peaceful free and open research and build an internet supercomputer. We render movies, solve Eternity puzzles, predict climate and improve a ~30 GHz cluster of clients.
    Downloads: 5 This Week
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  • 6
    Portable Linux

    Portable Linux

    Portable Ubuntu Linux for Scientific Computing

    Released August 22, 2013 Lubuntu Blends: Biochemistry 13.04 (Raring) v5.44 Linux Kernel Image 3.8.0-29 Lubuntu Blends are pre-installed Wubi disk image remixes of Ubuntu and Debian Science meta packages, A custom boot loader allows installations to be copied and automatically booted from most external or USB flash drives. Once up and running, use earlier Lubuntu Remix README instructions here until documentation is updated. https://sourceforge.net/projects/portable-linux/files/ Installation 1. Download the Wubi installer http://releases.ubuntu.com/saucy/wubi.exe 2. Install any flavor of Ubuntu. 3. Swap out the root.disk with the ones provided here. Overview LAMP stack running on localhost (127.0.0.1). Scientific, productivity & media packages include R (Rattle Data Miner), GridEngine, Condor, cooperative computing tools, WINE, LibreOffice, Evolution, Clinica, Neuro Debian Desktop, PsycoPy, OpenVibe, 3DSlicer, Paraview, Openshot. Cheers, Gregory Remington
    Downloads: 4 This Week
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  • 7
    The Saint Jude Project is a Project to develop Kernel-Level IDS mechinisms to protect the integrity of host systems.
    Downloads: 1 This Week
    Last Update:
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  • 8
    C64/65/128 networking software for FreeBSD, Linux, Amiga, Solaris, BeOS and Windows.
    Downloads: 4 This Week
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  • 9
    DOS-C Kernel is an MS-DOS compatible kernel and the original FreeDOS kernel.
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    Downloads: 2 This Week
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  • Skillfully - The future of skills based hiring Icon
    Skillfully - The future of skills based hiring

    Realistic Workplace Simulations that Show Applicant Skills in Action

    Skillfully transforms hiring through AI-powered skill simulations that show you how candidates actually perform before you hire them. Our platform helps companies cut through AI-generated resumes and rehearsed interviews by validating real capabilities in action. Through dynamic job specific simulations and skill-based assessments, companies like Bloomberg and McKinsey have cut screening time by 50% while dramatically improving hire quality.
    Learn More
  • 10

    smartCOMs

    smartCOM is a graphical serial device terminal.

    smartCOM is a graphical serial device terminal, it's an alternative to minicom. It is aimed mainly at hardware developers who need a gui test tools to talk to their custom hardware. The GUI is written using the wxWidgets library, and using the tinyxml to save or load config. http://gnssinfo.com/2012/11/21/wiki-smartcom/
    Downloads: 2 This Week
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  • 11
    MIDAS is a Network Monitoring and intrusion detection server. It uses a distributed client/server model that allows it to scale to very large networks. As well its own client It supports both Netsaint plugins and Big Brother Clients.
    Downloads: 3 This Week
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  • 12
    VTracer is a Verilog Testbench developer aid. Contains well documented Verilog-Perl co-simulation environment (TCP sockets based), structural Verilog parser, demo Testbenches.
    Downloads: 3 This Week
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  • 13
    Adding external probes to the Big Brother (BB4) system and network monitoring program
    Downloads: 2 This Week
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  • 14
    InstallBase is now InstallJammer and has moved to http://www.installjammer.com/
    Downloads: 2 This Week
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  • 15
    The MP4Free project provides a simulation, analysis and exploration platform for multi-processor system-on-chip applications at variable level of abstraction, providing also a comprehensive component library.
    Downloads: 2 This Week
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  • 16
    This project is a distributed processing system that is dynamically programmable using a custom assembly-type language.
    Downloads: 2 This Week
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  • 17
    A portable emulator for the HP (DEC, Compaq) AlphaServer ES40. The current version is capable of running OpenVMS with some limitations. The goal is to have a drop-in replacement for real ES40's. Emulates the Alpha AXP EV68CB processor and other devices.
    Downloads: 1 This Week
    Last Update:
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  • 18
    This is a port to Qt/C++ of the Jakarta project's excellent log4j package. Qt users can now benefit from a logging package that can be configured at run-time, thus minimizing (and ideally, eliminating) recompilation.
    Downloads: 1 This Week
    Last Update:
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  • 19
    Sarien is a portable implementation of the Sierra On-Line Adventure Game Interpreter (AGI), and is able to run games such as Leisure Suit Larry in the Land of the Lounge Lizards and Space Quest I and II.
    Downloads: 1 This Week
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  • 20
    Desktop environment based on Qt. Project has moved to https://github.com/vilkov/qfm
    Downloads: 1 This Week
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  • 21
    A retargettable micro-controller and embedded system emulator architecture, providing common supports to emulate various types of micro-processors & devices on an x86 PC. Development of emulation for Arduino and various shields is just about to be launched in 2012.
    Downloads: 1 This Week
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  • 22
    The Vortex project consists of 2 things. The Vortex OS and VParse. The OS is multitasking and handles a lot of features. VParse is a stand alone Vertex2 parser. Vertex is vortex's scripting language. Pre 0.7 is QBasic and 0.7 is C++.
    Downloads: 1 This Week
    Last Update:
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  • 23
    WOSH Framework - Wide Open Smart Home
    WOSH is a multi-platform message-oriented middleware written in ANSI C++. Service oriented architecture, designed for network distributed computing. Already working: Audio multimedia, X10, remote control (WinMobile, GTalk) and much more..
    Downloads: 1 This Week
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  • 24
    Compact implementation of the ext2 filesystem in user space, using the FUSE library. Uses include providing ext2/ext3 support on platforms which do not support it and as a base for filesystem projects.
    Downloads: 1 This Week
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  • 25

    A8E

    A small and fast Atari 800 XL emulator.

    A8E is a freeware Atari 800 XL emulator written in C by Sascha Springer and has been developed completely from scratch. It uses the SDL and OpenGL (optional) library for the user interface and the audio and graphics output.
    Downloads: 0 This Week
    Last Update:
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