System Software for Windows

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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.

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    The database for AI-powered applications.

    MongoDB Atlas is the developer-friendly database used to build, scale, and run gen AI and LLM-powered apps—without needing a separate vector database. Atlas offers built-in vector search, global availability across 115+ regions, and flexible document modeling. Start building AI apps faster, all in one place.
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  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

    Get your domain at wholesale price. Cloudflare offers simple, secure registration with no markups, plus free DNS, CDN, and SSL integration.

    Register or renew your domain and pay only what we pay. No markups, hidden fees, or surprise add-ons. Choose from over 400 TLDs (.com, .ai, .dev). Every domain is integrated with Cloudflare's industry-leading DNS, CDN, and free SSL to make your site faster and more secure. Simple, secure, at-cost domain registration.
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  • 1
    Scrollout F1

    Scrollout F1

    An easy-to-use anti-spam email gateway

    • Designed for Linux and Windows email system administrators, Scrollout F1 is an easy to use, already adjusted email firewall (gateway) offering free anti-spam and anti-virus protection aiming to secure existing email servers, old or new, such as Microsoft Exchange, Lotus Domino, Postfix, Exim, Sendmail, Qmail and others. • Built-in multilayer security levels make configuration effort equal to a car radio. • It combines simplicity with effective protection using powerful open source with additional set of rules & filters. • Available as 64bit: - ISO image (Internet connection required during installation) - install from scratch (Internet connection required during installation). • Minimum Requirements (for 5,000 messages/day): 1 GB of RAM 30 GB storage drive 1 Processor x86/AMD64 1 Ethernet x 1 IPv4 address UDP ports: 53 123 4500 6277 24441 TCP ports: 25 80 443 2703
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    Downloads: 110,542 This Week
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  • 2
    Info-ZIP portable compression/archiver utilities (Zip, UnZip, WiZ, etc.)
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    Downloads: 94,937 This Week
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  • 3
    android-x86

    android-x86

    A project to bring Android to the x86 platform

    This is a project to port Android open source project to x86 platform, formerly known as "patch hosting for android x86 support". http://www.android-x86.org/
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    Downloads: 19,455 This Week
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  • 4
    Ufficio Zero Linux OS

    Ufficio Zero Linux OS

    Linux Desktop OS for professionals

    Ufficio Zero Linux OS is a desktop operating system offered in many versions based on PCLinuxOS, Linux Mint and Devuan. We also have created Duplica, a Bare Metal Restore Solution. This distro has many packages for professional use. The project is managed by the Italian company SIITE SRLS and promoted by the Italian Association Boost Media APS. Ufficio Zero Linux OS is trademarked through the Linux Mark Institute. All rights reserved. Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries. website https://ufficiozero.org forum https://forum.ufficiozero.org wiki https://wiki.ufficiozero.org YouTube Channel https://www.youtube.com/@UfficioZeroLinuxOS Boost Media APS https://boostmedia.it
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    Downloads: 25,410 This Week
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  • The All-in-One Commerce Platform for Businesses - Shopify Icon
    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
    Learn More
  • 5
    Asuswrt-Merlin

    Asuswrt-Merlin

    Alternative firmware for Asus wireless routers

    Asuswrt-Merlin is a third party firmware for select Asus wireless routers. Based on the Asuswrt firmware developed by Asus, it brings tweaks, new features and other improvements to the original firmware, while retaining its performance and ease of use. Note that only downloads are hosted on SF.net - the complete source code can be found on https://github.com/RMerl/asuswrt-merlin (legacy 380.xx) and https://github.com/RMerl/asuswrt-merlin.ng (382 and newer releases).
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    Downloads: 9,959 This Week
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  • 6
    Eraser

    Eraser

    A security tool to remove sensitive data from your Windows hard drive

    Eraser is a secure data removal tool for Windows. It completely removes sensitive data from your hard drive by overwriting it several times with carefully selected patterns.
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    Downloads: 11,154 This Week
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  • 7
    rEFInd

    rEFInd

    An EFI boot manager utility

    rEFInd is a fork of the rEFIt boot manager. Like rEFIt, rEFInd can auto-detect your installed EFI boot loaders and it presents a pretty GUI menu of boot options. rEFInd goes beyond rEFIt in that rEFInd better handles systems with many boot loaders, gives better control over the boot loader search process, and provides the ability for users to define their own boot loader entries.
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    Downloads: 5,399 This Week
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  • 8
    Catacombae

    Catacombae

    A free collection of applications and utility programs

    This project serves as a collection of different free software projects that I'm working on. The major ones are currently "HFSExplorer", "DMGExtractor", and "NTFS-3G for Mac OS X".
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    Downloads: 3,482 This Week
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  • 9
    blissos-dev

    blissos-dev

    Android for your PC, but more Blissful

    Bliss OS (x86) Android for your PC An Open Source OS, based on Android, that incorporates many optimizations, features, and expanded device support. And it is available for just about any Chromebook, Windows/Linux PC or tablet released in the last 4 years Our support options use Telegram chats. Bliss OS (x86) Support chat: https://t.me/blissx86 Bliss ROM/OS Build Support chat: https://t.me/Team_Bliss_Build_Support Android-Generic Project development chat: https://t.me/androidgenericpc
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    Downloads: 4,185 This Week
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  • Connect every part of your business to one bank account Icon
    Connect every part of your business to one bank account

    North One is a business banking app that integrates cash flow, payments, and budgeting to turn your North One Account into one Connected Bank Account

    North One is proudly built for small businesses, startups and freelancers across America. Make payments easily, keep tabs on your money and put your finances on autopilot through smart integrations with the tools you’re already using. North One was built to make managing money easy so you can focus on running your business. No more branches. No more lines. No more paperwork. Get complete access to your North One Account from your phone or computer, wherever your business takes you. Create Envelopes for taxes, payroll, rent, and anything else automatically.
    Get started for free.
  • 10
    Angry IP Scanner

    Angry IP Scanner

    A cross-platform network scanner that is fast and simple to use

    Angry IP scanner is fast and friendly network scanner for Windows, Linux, and Mac. It is very extensible, allowing it to be used for very wide range of purposes, with the primary goal of being useful to network administrators.
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    Downloads: 2,946 This Week
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  • 11
    Forge Auto Clicker

    Forge Auto Clicker

    Fully Customisable and Super Fast Free Auto Clicker. Free Updates.

    Fully Customisable and Super Fast Free auto clicker. Fully-fledged with many modes of automatic clicking. Change click speed, cursor position, hotkeys and more with all settings saved. Forge Auto Clicker brings new, never seen before features to auto clicking. The AutoClicker is fully customizable with many useful functions as well as being easy to use, fast and free! As well as this, Forge Auto Clicker comes with no ads or malware making an amazing user experience! Use this autoclicker on ANY game! Minecraft, Roblox and more! Forge Auto Clicker Tutorial: https://youtu.be/v8_nevMgjL8 NOTE: Forge Auto Clicker is NOT a virus, certain anti-virus programs and search engines detect this as a false positive, however, it will not harm your computer.
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    Downloads: 2,132 This Week
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  • 12
    DeSmuME

    DeSmuME

    DeSmuME is a Nintendo DS emulator

    DeSmuME is the most seasoned open source Nintendo DS emulator. It sports tools designed for hackers, speedrunners, youtubers, and casual gamers. Homebrew programs are supported and can even be debugged through GDB. The Windows and OSX versions are both relatively feature rich, and there is a small universe of forks and mods that add even more features for casual gaming. DeSmuME is the origin of RetroArch and OpenEmu Nintendo DS support and is used by several mobile Nintendo DS emulators, with the notable exception of DraStic. DeSmuME's source code is now hosted at https://github.com/TASVideos/desmume/ win32 autobuilds @ https://ci.appveyor.com/project/zeromus/desmume/build/artifacts
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    Downloads: 1,569 This Week
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  • 13
    WinDirStat: Windows Directory Statistics

    WinDirStat: Windows Directory Statistics

    A disk usage statistics viewer and cleanup tool for Windows

    WinDirStat (Windows Directory Statistics) is a disk usage statistics viewer and cleanup tool for Windows. On start up, WinDirStat reads the whole directory tree once and then presents it in three useful views. The official download location and collaboration platform for WinDirStat has moved to GitHub: https://github.com/windirstat/windirstat Downloads and source code provided on SourceForge may not always be up to date. They are primarily used for disaster recovery purposes.
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    Downloads: 1,141 This Week
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  • 14
    Fast Mouse Clicker
    A tool that clicks the mouse extremely quickly. Using keyboard keys (or mouse buttons) as the trigger, you can position the mouse, then hit a key to click up to 9999 times every second.
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    Downloads: 1,589 This Week
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  • 15
    Nikkho

    Nikkho

    Javier Gutiérrez Chamorro (Guti) Open source projects

    Javier Gutiérrez Chamorro (Guti) Open source projects Author's website: https://www.javiergutierrezchamorro.com
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    Downloads: 1,055 This Week
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  • 16
    Radeon-ID

    Radeon-ID

    Official Mirror for AMD Domestic Community Drivers Indonesia

    AMD Domestic Community Driver with Multi-Kernel Radeon Driver Release Experience enhanced performance and flexibility with our multi-kernel Radeon driver, tailored for the AMD community. 📢 Need help or have questions? Join our 24/7 Discord support channel for real-time assistance and discussions: https://discord.gg/rdnid
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    Downloads: 5,416 This Week
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  • 17
    Unpacker for installations made by Inno Setup
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    Downloads: 704 This Week
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  • 18

    OptiPNG

    Advanced PNG optimization program

    OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections.
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    Downloads: 697 This Week
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  • 19
    Solution to the cooling fan noise annoyances Thinkpad T4x (T40/T41/T42/T43) notebook series. Allows the user to control fan activity based on the system temperature. Win XP Visual C++ project controls the fan via port IO to the embedded controller.
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    Downloads: 616 This Week
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  • 20

    Monitor Profile Switcher

    Save and easily switch between Windows multi monitor configurations

    Save monitor configurations of Windows 7 or 10 and easily switch between them with a click in a popup menu of your taskbar. The tool is designed for users with two or more monitors who in certain situations would like to quickly change their monitor setup (e.g. enable/disable a TV which is attached to the HDMI port, make an attached TV the primary display to remove tearing switch which monitor is on the left/right...). Along the monitor state and setup the resolution is also saved and restored. The program works by saving a current monitor setup as configured using the windows control panel to an xml file. Once saved the configuration can be quickly restored at any time. Requires .NET 4.0 Framework to be installed. The program is quite simple and in an early development stage. It is provided without any warranty. If you accidentally disable all your monitors boot into safe mode to fix the problem. If you like the program say thanks by clicking the Donation link in the menu!
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    Downloads: 476 This Week
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  • 21
    WinLaunch

    WinLaunch

    macOS Launchpad for Windows

    WinLaunch provides a beautiful way to organize and access all of your important applications and documents. The overall style has been heavily influenced by Apples macOS Launchpad. WinLaunch is being actively developed and improved, my goal is to provide the best app launching experience available on Windows. You can now support the development of WinLaunch on Patreon for access to custom themes and priority feature requests https://www.patreon.com/WinLaunch
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    Downloads: 675 This Week
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  • 22
    libusbK

    libusbK

    A complete software solution for windows usb devices

    libusbK is a complete driver/library solution for vendor class usb device interfaces. If you are a usb developer or usb device manufacturer seeking a driver solution for a new USB widget then libusbK could be for you. libusbK encompasses a 100% WinUSB compatible api/funtion set. All WinUSB power/pipe polices are fully supported by the libusbK driver. In Addition, libusbK has full support for isochronous endpoints and an extensive set of additional modules to simplify development. Source code repository using github: https://github.com/mcuee/libusbk
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    Downloads: 718 This Week
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  • 23

    OpenOCD - Open On-Chip Debugger

    The Open On-Chip Debugger

    The "Open On-Chip Debugger" provides JTAG/SWD access from GDB (or directly with TCL scripts) to processors with ARM and MIPS based cores. See website for full list of supported targets.
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    Downloads: 588 This Week
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  • 24
    GRUB for DOS is the dos extension of GRUB. It enables dos users to run the configuration console directly in real mode. The project also contains an utility called WINGRUB, an GUI intends to help configuring and installing GRUB in the WINDOWS environment
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    Downloads: 451 This Week
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  • 25
    ZSNES is a SNES/Super Famicom emulator for x86 computers. It runs on Windows, MS-DOS and Linux/FreeBSD and supports mode 7, sound, Super FX, and a lot more.
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    Downloads: 393 This Week
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