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

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • 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
  • 1
    HWiNFO

    HWiNFO

    Comprehensive Hardware Analysis, Monitoring and Reporting for Windows

    Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. HWiNFO is an all-in-one solution for hardware analysis and monitoring supporting a broad range of OSes (DOS, Microsoft Windows 95 - Windows 11, WinPE) and platforms (i8086 - Xeon Platinum). Exhausting information about hardware components displayed in hierarchy unfolding into deep details. Useful for obtaining a detailed hardware inventory report or checking of various hardware-related parameters. Real-time monitoring of a variety of system and hardware parameters covering CPUs, GPUs, mainboards, drives, peripherals, etc. Useful for detection of overheating, overload, performance loss or failure prediction. Full hardware hierarchy, or quick summary overview. Export into XML, CSV, HTML reports. System monitoring in customizable tables, graphs, tray icons, OSD.
    Downloads: 4,977 This Week
    Last Update:
    See Project
  • 2
    waircut

    waircut

    WPS wireless protocol audit software for Windows

    Wireless Air Cut is a WPS wireless, portable and free network audit software for Ms Windows. It is used to check the security of our wps wireless networks and to detect possible security breaches. You can check if the router has a generic and known wps pin set, if it is vulnerable to a brute-force attack or is vulnerable to a Pixie-Dust attack. You can see the Installation instructions on Wiki. ------- Wireless Air Cut es un software de auditoria del protocolo WPS en redes wireless, portable, libre y gratuito para Ms Windows. Sirve para comprobar la seguridad WPS de nuestras redes wireless y detectar posibles brechas de seguridad. Puede comprobar si el router tiene establecido un pin wps genérico y conocido, si es vulnerable a un ataque por fuerza bruta o si es vulnerable a un ataque Pixie-Dust. Ver Instrucciones de instalación en la wiki.
    Leader badge
    Downloads: 3,701 This Week
    Last Update:
    See Project
  • 3
    VeraCrypt

    VeraCrypt

    Open source disk encryption with strong security for the Paranoid

    VeraCrypt is a free disk encryption software brought to you by IDRIX (https://www.idrix.fr) and based on TrueCrypt 7.1a. It adds enhanced security to the algorithms used for system and partitions encryption making it immune to new developments in brute-force attacks. It also solves many vulnerabilities and security issues found in TrueCrypt. This enhanced security adds some delay ONLY to the opening of encrypted partitions without any performance impact to the application use phase. This is acceptable to the legitimate owner but it makes it much harder for an attacker to gain access to the encrypted data. All released files are PGP signed with key ID=0x680D16DE, available on key servers and downloadable at https://www.idrix.fr/VeraCrypt/VeraCrypt_PGP_public_key.asc VeraCrypt can mount TrueCrypt volumes. It also can convert them to VeraCrypt format. Documentation: https://www.veracrypt.fr/en/Documentation.html FAQ : https://www.veracrypt.fr/en/FAQ.html
    Leader badge
    Downloads: 2,231 This Week
    Last Update:
    See Project
  • 4

    UFTP

    Encrypted UDP based FTP with multicast

    UFTP is an encrypted multicast file transfer program, designed to securely, reliably, and efficiently transfer files to multiple receivers simultaneously. This is useful for distributing large files to a large number of receivers, and is especially useful for data distribution over a satellite link (with two way communication), where the inherent delay makes any TCP based communication highly inefficient. The multicast encryption scheme is based on TLS with extensions to allow multiple receivers to share a common key. UFTP also has the capability to communicate over disjoint networks separated by one or more firewalls (NAT traversal) and without full end-to-end multicast capability (multicast tunneling) through the use of a UFTP proxy server. These proxies also provide scalability by aggregating responses from a group of receivers.
    Leader badge
    Downloads: 1,654 This Week
    Last Update:
    See Project
  • Atera - The depth of a full-stack IT platform, with the power of AI. Icon
    Atera - The depth of a full-stack IT platform, with the power of AI.

    Atera introduces your autonomous AI agent - Ensure operational efficiency at any scale with 24/7 autonomous IT support.

    Atera prioritizes security and compliance through robust protections that align with industry standards. Our AI-driven features were built on responsible AI principles and empower IT teams to work efficiently while maintaining trust and compliance.
    Learn More
  • 5
    Fast and user-friendly free tool for drivers's backup, restoration and removal with command line options, automatic restoration from CD\DVD and path formatting. DriverBackup! includes also an interactive command line builder.
    Leader badge
    Downloads: 695 This Week
    Last Update:
    See Project
  • 6
    cdrtfe

    cdrtfe

    Burn optical discs in various formats

    cdrtfe is a CD/DVD/BD burning application for Microsoft Windows. You can burn data discs, Audio CDs, XCDs, (S)VCDs and DVD-Video discs. It supports creation and writing of ISO images and bootable discs. cdrtfe has a multi-language interface and is also available as portable version.
    Leader badge
    Downloads: 517 This Week
    Last Update:
    See Project
  • 7
    FreeRTOS Real Time Kernel (RTOS)

    FreeRTOS Real Time Kernel (RTOS)

    Market leading real time kernel for 40+ microcontroller architectures

    ************************************************************************************************************************ * The primary FreeRTOS repository is now in Git. Go to https://github.com/freertos for the latest FreeRTOS kernel and libraries. * Our support has moved to https://forums.freertos.org. ************************************************************************************************************************ FreeRTOS is a market-leading real-time operating system (RTOS) for microcontrollers and small microprocessors. Distributed freely under the MIT open source license, FreeRTOS includes a kernel and a growing set of libraries suitable for use across all industry sectors. Visit https://www.freertos.org for more information and other download options. Note about support/discussions forum: The FreeRTOS support forum has moved to https://forums.freertos.org. Please update your bookmarks and create new posts in the appropriate category in the new community forums.
    Leader badge
    Downloads: 258 This Week
    Last Update:
    See Project
  • 8
    Leader badge
    Downloads: 250 This Week
    Last Update:
    See Project
  • 9
    QP Real-Time Event Frameworks & Tools

    QP Real-Time Event Frameworks & Tools

    Real-Time Event Frameworks based on active objects & state machines

    QP real-time event frameworks (RTEFs) provide lightweight, modern, event-driven architecture based on asynchronous Active Objects (Actors) and Hierarchical State Machines. The matching QM model-based design tool and other host-based tools complement the QP frameworks by supporting graphical modeling, code generation, software tracing, and unit testing for event-driven embedded software. Visit https://www.state-machine.com for more information. The QP RTEFs can run on bare-metal microcontrollers, replacing a traditional RTOS. The frameworks contain a selection of built-in real-time kernels (RTOS kernels), such as the cooperative QV kernel, the preemptive non-blocking QK kernel, and the unique preemptive, dual-mode (blocking/non-blocking) QXK kernel. Native QP ports and ready-to-use examples are provided for ARM Cortex-M (M0/M0+/M3/M4/M7/M33/...) as well as other CPUs. The QP RTEFs can also work with many traditional RTOSes and General-Purpose OSes, such as Linux and Windows.
    Leader badge
    Downloads: 169 This Week
    Last Update:
    See Project
  • Free and Open Source HR Software Icon
    Free and Open Source HR Software

    OrangeHRM provides a world-class HRIS experience and offers everything you and your team need to be that HR hero you know that you are.

    Give your HR team the tools they need to streamline administrative tasks, support employees, and make informed decisions with the OrangeHRM free and open source HR software.
    Learn More
  • 10
    VertrigoServ WAMP

    VertrigoServ WAMP

    Complete WAMP Server - PHP Apache MySQL for Windows.

    VertrigoServ is a complete free WAMP server allowing PHP development for Windows. It installs Apache 2.4, PHP, MySQL and PhpMyAdmin, both installing and setting up the environment. An uninstaller allows you to remove Vertrigo from hard disc. Vertrigo is a freeware compilation of free software (under GPL, Apache License). Main aplication has closed source code. For license details please take a look at every single component terms and conditions.
    Leader badge
    Downloads: 129 This Week
    Last Update:
    See Project
  • 11
    vDos

    vDos

    Run DOS applications in Windows.

    vDos is specific to run serious (mainly text mode) DOS applications in Windows 32 or 64-bit, Windows 7 or later. You need at least already use such a DOS application to appreciate vDos. If you don’t, want to play with DOS (or its games): vDos isn’t meant for you! Recent versions (latest 2025.05.01) and the vDos forum are now hosted at: https://www.vdos.info
    Leader badge
    Downloads: 107 This Week
    Last Update:
    See Project
  • 12
    EchoLife ONT Tools Huawei

    EchoLife ONT Tools Huawei

    Software para cargar firmware de Routers modem HUAWEI

    Herramienta para cargar firmware a router modem de fibra HUAWEI Modelos admitidos: HG8145V5 - EG8145V5 - HG8245W5-6T y HG8245Q2
    Leader badge
    Downloads: 324 This Week
    Last Update:
    See Project
  • 13
    NiceHash Miner

    NiceHash Miner

    NiceHash easy to use CPU & GPU miner

    NiceHash Miner is an easy to use CPU & GPU cryptocurrency miner for Windows. With a simple an intuitive graphical user interface it allows you to quickly turn your PC, workstation or server into money-making cryptocurrency mining machine. Why leave your computer idle, whereas it could earn you Bitcoins with just a few clicks? NiceHash Miner is essentially the only tool a miner needs. No need to go through tons of configuration files, various mining software versions, configuration tuning or cryptocurrency coins market analysis. Auto-tuning for best performance and efficiency, automatic selection and runtime automatic switching to most profitable cryptocurrency algorithm are all integrated into NiceHash Miner and will enable you seamless, joyful and profitable mining experience.
    Downloads: 17 This Week
    Last Update:
    See Project
  • 14
    Auto Mouse Clicker (AMC)

    Auto Mouse Clicker (AMC)

    The program to simulate mouse clicks

    PayPal: wulgarni@gmail.com new project, chat community - https://wapczat.pl/ Auto Mouse Clicker (AMC) is an automatic mouse clicker that allows for a random time to perform the clicks. You can also specify an exact time. It also allows you to specify the exact location or click to set a random place for clicks in a given area (drawing a square with your mouse). The program supports setting different sequences for clicks.
    Downloads: 89 This Week
    Last Update:
    See Project
  • 15
    NebiOS Alternative Mirror (Official)

    NebiOS Alternative Mirror (Official)

    An Ubuntu Linux-based OS that aims to end user.

    NebiOS is Ubuntu-based secure, privacy-focused universal OS for daily life, creativity, gaming & more. Official mirror - use if main site has download issues. Main site: https://nebios.org ⚠️ DON'T DOWNLOAD FROM UNKNOWN SOURCES! 🛡️ Privacy: NebiOS has no telemetry, no background data services, no tracking daemons, and cannot send any personal data without user action. Full policy: nebisoftware.com/legal/privacy.html === 🚀 NebiOS X out now! ⚠️ Note on Virtual Machines: NebiOS X is optimized and designed for real hardware performance and native GPU acceleration. Virtualization platforms (VMware, VirtualBox, GNOME Boxes, etc.) may show degraded graphics or system performance. For accurate testing, please install NebiOS X on physical hardware. === System Requirements and informations about before installation can be found at https://nebios.org/download (select your version for it)
    Leader badge
    Downloads: 136 This Week
    Last Update:
    See Project
  • 16
    AutoVPNConnect

    AutoVPNConnect

    VPN connection keep alive tool

    AutoVPNConnect is a nice tool for everyone that works daily with VPN. This tool keeps your VPN connection open. Every VPN connection created with the Windows built in VPN client is supported. This tool can connect to your VPN when starting Windows, and can be configured to work completely in background. Install it and enjoy! Supported Windows versions: Windows 7 Windows 8 Important note: AutoVPNConnect is since version 3.0 significantly improved. When you are running an older version, you should consider to upgrade to the latest version. See the page 'Files' for more information.
    Leader badge
    Downloads: 58 This Week
    Last Update:
    See Project
  • 17
    Full Stack Computer Scanner

    Full Stack Computer Scanner

    Scans the entire computer device "stack" (hardware, software, comms)

    The Full Stack Computer Scanner is a proprietary FREEWARE Windows system diagnostics tool designed to help assess a computer’s security posture. The application performs read-only analysis across 50 key system sectors, including hardware, firmware, boot components, operating system configuration, installed software, browser extensions, and network-related indicators. This is the initial 2026 public release of a transparency-first scanner focused on visibility and education rather than automated remediation. The project includes the app, full documentation, architecture disclosure, and detailed explanations of each scan area. License: Proprietary Freeware (not open source). See Freeware License 2026.txt for full terms. Thank you for your visit.
    Downloads: 64 This Week
    Last Update:
    See Project
  • 18
    FileCentipede

    FileCentipede

    File centipede is an internet file download manager

    File centipede is an internet file download/upload manager, Torrent client, WebDAV client, FTP client, and SSH client. It's fast, customizable, user-friendly, multi-protocols supported, and free with no ads. It also contains many useful auxiliary tools such as HTTP requester, file merge, and encoders. With the browser integration, you can download audio and videos from websites, even encrypted videos. File centipede makes everything easy and efficient, it's the best internet download manager you can find.
    Downloads: 49 This Week
    Last Update:
    See Project
  • 19
    M+GUI - A Qt implementation of MameUI
    Leader badge
    Downloads: 119 This Week
    Last Update:
    See Project
  • 20
    i-doit - Open Source CMDB & ITSM Tool

    i-doit - Open Source CMDB & ITSM Tool

    ITIL conform CMDB solution for documenting your entire IT landscape

    i-doit is a web based IT documentation and CMDB. i-doit documents IT-systems and their changes, defines emergency plans, displays vital information and helps to ensure a stable and efficient IT operation: The technical documentation: This means that all information can be organised (details flexibly adjusted), stored and maintained in one place. This allows simple Helpdesk, Support and Planning functions and provides the basis for quality assurance and certification. i-doit allows services to be documented as a logical grouping of objects placed in relation to each other. This provides the basis for (ITIL) processes such as Change and Problem Management, helps to control and manage the SLA (Service Level Agreement) or the communication with users. Its interfaces to other ITSM applications (like Nagios, Request Tracker etc.) allow the entering of data only once in the ITSM environment. i-doit maintains one holistic view of the operational situation.
    Downloads: 33 This Week
    Last Update:
    See Project
  • 21
    VitalSignsCapture

    VitalSignsCapture

    Download data from medical device interfaces in ICU & Anaesthesia

    A C# .NET app to download or capture data from several medical device interfaces such as Datex AS3 S/5 Anesthesia, Philips Intellivue, GE Dash, Mindray HL7, Spacelabs, Draeger Infinity, Draeger HL7 patient monitors, GE Engstrom, Draeger (MedibusX), Maquet (Servo-i, Servo-U & Flow-i), Puritan Bennett ventilators, Covidien BIS Vista cerebral monitor, Fresenius Agilia, Alaris Carefusion, BBraun Spacecom syringe and volumetric pumps, Roche Cobas ASTM ABG analyzers. Requires Visual Studio 2022, .NET 8 or Visual Studio for Mac to compile. Support for capture from other monitors is planned in future.
    Leader badge
    Downloads: 19 This Week
    Last Update:
    See Project
  • 22
    VeraWipe

    VeraWipe

    Secure Disk Wipe

    A secure disk wipe tool based on VeraCrypt encryption engine. Release archives are signed using PGP key with fingerprint 607E5A7AD030D38E5E5C2CA502C30AE90FAE4A6F belonging to Mounir IDRASSI and which can be found on major key servers (e.g.. https://keys.openpgp.org/vks/v1/by-fingerprint/607E5A7AD030D38E5E5C2CA502C30AE90FAE4A6F).
    Downloads: 43 This Week
    Last Update:
    See Project
  • 23

    dpaehl

    Converts files between many different archive formats

    * This convertor can convert the following archives: * 7-ZIP/ LZH / CAB / ZIP / ARJ / ACE / RAR / TAR / TGZ / GZ / Z / BZ2 / YZ1 / YZ2 / GCA / BEL / RPM / DEB/ BH / Noa32 / HKI / PAQAR / SQX /HA /ZOO /UHARC /LFB / ZLIB / UCL / IMP / RS / SPL / APK / Arc
    Leader badge
    Downloads: 14 This Week
    Last Update:
    See Project
  • 24
    File Checksum Utility

    File Checksum Utility

    Calculate MD5, SHA1, SHA256 and SHA512 Hashes

    This software allows to generate MD (Message Digest) and SHA hashes from a file or files or files in a directory. Checksum is an value calculated from a content of file by special algorithm. You can also verify the file integrity of the downloaded document or program. File Checksum Utility is very easy to use. From the graphical user interface, choose the file from your computer storage. The tool calculate and display checksum values. File Checksum Utility is a free software (Freeware) that is available for use at no monetary cost. It is fully functional for an unlimited time. You can copy and diffuse it without restriction if it's free of charge. The author restricts the rights of the user to modify, make derivative works, or reverse-engineer the software.
    Leader badge
    Downloads: 38 This Week
    Last Update:
    See Project
  • 25
    Ultimate Auto Typer
    This software is developed in C# using Visual Studio 2010. It act as an online bot.
    Leader badge
    Downloads: 62 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • 3
  • 4
  • 5
  • Next