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.

  • Paessler: Easy to Use With Enterprise Power. Free Trial Icon
    Paessler: Easy to Use With Enterprise Power. Free Trial

    A low-code dashboard makes monitoring intuitive for any admin, while scripting and custom sensors give experts full control.

    You shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
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  • 99.99% Uptime for MySQL and PostgreSQL Databases Icon
    99.99% Uptime for MySQL and PostgreSQL Databases

    Sub-second maintenance. 2x read/write performance. Built-in vector search for AI apps.

    Cloud SQL Enterprise Plus delivers near-zero downtime with 35 days of point-in-time recovery. Supports MySQL, PostgreSQL, and SQL Server.
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  • 1
    CrystalDiskInfo

    CrystalDiskInfo

    A HDD/SSD utility software

    A HDD/SSD utility software which supports a part of USB, RAID and NVMe.
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    4.7 out of 5 stars 19 Reviews
    Downloads: 789,774 This Week
    Last Update:
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  • 2
    AutoClicker

    AutoClicker

    A full-fledged autoclicker with two modes of autoclicking

    A full-fledged autoclicker with two modes of autoclicking, at your dynamic cursor location or at a prespecified location. The maximum amounts of clicked can also be set (or left as infinite). Hotkeys work in the background for convenience. If you need to automate multiple mouse clicks, try this multiple auto clicker: https://sourceforge.net/projects/orphamielautoclicker/files/AutoClickers.exe/download Whats new in v1.0.0.2: 1. You can now change your hotkeys! 2. Changed the about page 3. Added a few minor options v1.0.0.1 : 1. Your settings are now saved from your last session so you only need to enter them once. (Includes last fixed location) 2. Added double clicking and triple clicking 3. Added Right clicking and middle clicking
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    4.5 out of 5 stars 222 Reviews
    Downloads: 688,677 This Week
    Last Update:
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  • 3
    Ventoy

    Ventoy

    A New Bootable USB Solution

    Ventoy is an open source tool to create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files. With Ventoy, you don't need to format the disk over and over, you just need to copy the ISO/WIM/IMG/VHD(x)/EFI files to the USB drive and boot them directly. You can copy many files at a time and Ventoy will give you a boot menu to select them. You can also browse ISO/WIM/IMG/VHD(x)/EFI files in local disks and boot them. x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI, ARM64 UEFI and MIPS64EL UEFI are supported in the same way. Most types of OS supported (Windows/WinPE/Linux/ChromeOS/Unix/VMware/Xen...) 1100+ ISO files are tested, 90%+ distros in distrowatch.com supported.
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    4.6 out of 5 stars 51 Reviews
    Downloads: 228,032 This Week
    Last Update:
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  • 4
    TurboVNC

    TurboVNC

    High-speed, 3D-friendly, TightVNC-compatible remote desktop software

    TurboVNC is a high-performance, enterprise-quality version of VNC based on TightVNC, TigerVNC, and X.org. It contains a variant of Tight encoding that is tuned for maximum performance and compression with 3D applications (VirtualGL), video, and other image-intensive workloads. TurboVNC, in combination with VirtualGL, provides a complete solution for remotely displaying 3D applications with interactive performance. TurboVNC's high-speed encoding methods have been adopted by TigerVNC and libvncserver, and TurboVNC is also compatible with any other TightVNC derivative. TurboVNC forked from TightVNC in 2004 and still covers all of the TightVNC 1.3.x features, but TurboVNC contains numerous feature enhancements and bug fixes relative to TightVNC, and it compresses 3D and video workloads much better than TightVNC while using generally only 5-20% of the CPU time of the latter. Using non-default settings, TurboVNC can also be made to compress 2D workloads as "tightly" as TightVNC.
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    4.9 out of 5 stars 16 Reviews
    Downloads: 116,533 This Week
    Last Update:
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  • Earn up to 16% annual interest with Nexo. Icon
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  • 5

    Info-ZIP project

    Info-ZIP portable compression/archiver utilities

    Info-ZIP portable compression/archiver utilities (Zip, UnZip, WiZ, etc.)
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    5.0 out of 5 stars 17 Reviews
    Downloads: 115,414 This Week
    Last Update:
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  • 6
    CrystalDiskMark

    CrystalDiskMark

    A simple disk benchmark software

    A simple disk benchmark software.
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    4.8 out of 5 stars 13 Reviews
    Downloads: 102,741 This Week
    Last Update:
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  • 7
    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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    4.8 out of 5 stars 85 Reviews
    Downloads: 87,629 This Week
    Last Update:
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  • 8
    NSIS: Nullsoft Scriptable Install System

    NSIS: Nullsoft Scriptable Install System

    Windows installer development tool

    NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution. Being a user's first experience with your product, a stable and reliable installer is an important component of succesful software. With NSIS you can create such installers that are capable of doing everything that is needed to setup your software. NSIS is script-based and allows you to create the logic to handle even the most complex installation tasks. Many plug-ins and scripts are already available: you can create web installers, communicate with Windows and other software components, install or update shared components and more.
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    4.9 out of 5 stars 80 Reviews
    Downloads: 48,345 This Week
    Last Update:
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  • 9
    IDM Trial Reset

    IDM Trial Reset

    Use IDM forever without cracking

    IDM Trial Reset is a lightweight utility designed to reset the trial period of Internet Download Manager (IDM), allowing users to continue using the software without immediate license enforcement. Built using AutoIt, the tool automates registry and system-level modifications required to remove or reset trial-related data. It provides a simple interface or executable that performs the reset process without requiring deep technical knowledge from the user. The project emphasizes ease of use and portability, enabling users to run the tool whenever the trial period expires. While it does not modify the core IDM software, it interacts with system configurations to extend usability, and the repository encourages users to purchase a license if possible. Its open-source nature allows users to inspect or rebuild the executable themselves, increasing transparency.
    5.0 out of 5 stars 1 Review
    Downloads: 10,204 This Week
    Last Update:
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  • Build Data Resilience - Take the Assessment Today Icon
    Build Data Resilience - Take the Assessment Today

    Can you recover when it matters most? Take this quick assessment to identify gaps and build greater recovery confidence.

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  • 10
    7-Zip

    7-Zip

    A free file archiver for extremely high compression

    7-Zip is a file archiver with a high compression ratio. 7-Zip works in Windows 11 / 10 / 8 / 7 / Vista / XP / 2022 / 2019 / 2016 / 2012 / 2008 / 2003 / 2000. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. And there is command line version for Linux and macOS. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license with GNU LGPL + unRAR restrictions. Check the license for details.
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    4.8 out of 5 stars 833 Reviews
    Downloads: 35,488 This Week
    Last Update:
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  • 11
    WinMerge

    WinMerge

    Windows visual diff and merge for files and directories

    WinMerge is a Windows tool for visual difference display and merging, for both files and directories. It is highly useful for determining what has changed between file versions, and then merging those changes. WinMerge has Unicode support, Flexible syntax coloring editor, Visual SourceSafe integration, and Windows Shell integration. Regexp filtering for filenames and lines. Side-by-side line difference and highlights differences inside lines. A file map shows the overall file differences in a location pane. The user interface is translated into several languages.
    Leader badge
    4.8 out of 5 stars 193 Reviews
    Downloads: 34,822 This Week
    Last Update:
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  • 12
    GParted

    GParted

    A partition editor to graphically manage disk partitions

    GNOME Partition Editor for creating, reorganizing, and deleting disk partitions. It uses libparted from the parted project to detect and manipulate partition tables. Optional file system tools permit managing file systems not included in libparted.
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    4.7 out of 5 stars 115 Reviews
    Downloads: 34,335 This Week
    Last Update:
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  • 13
    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
    Leader badge
    4.6 out of 5 stars 121 Reviews
    Downloads: 34,333 This Week
    Last Update:
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  • 14
    d-apt

    d-apt

    APT repository to easily install/upgrade D binary packages

    "d-apt" is an APT repository to easily install/upgrade D binary packages on systems like Debian, Ubuntu, LinuxMint, etc.
    Leader badge
    Downloads: 190,260 This Week
    Last Update:
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  • 15
    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://citiverse.it/category/211/ufficio-zero-linux-forum-di-supporto wiki https://wiki.ufficiozero.org Follow us on our socials https://littlelink.boostmedia.it/ufficiozero/ Boost Media APS https://boostmedia.it
    Leader badge
    4.0 out of 5 stars 4 Reviews
    Downloads: 46,756 This Week
    Last Update:
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  • 16
    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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    4.3 out of 5 stars 62 Reviews
    Downloads: 33,656 This Week
    Last Update:
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  • 17
    GPT fdisk is a disk partitioning tool loosely modeled on Linux fdisk, but used for modifying GUID Partition Table (GPT) disks. The related FixParts utility fixes some common problems on Master Boot Record (MBR) disks.
    Leader badge
    4.8 out of 5 stars 17 Reviews
    Downloads: 27,779 This Week
    Last Update:
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  • 18

    PINN

    PINN is an enhancement of NOOBS

    PINN is an enhancement of NOOBS for the Raspberry Pi. It allows the installation of MULTIPLE OSes on the same SD/HDD/SSD device with an OS chooser when booting. Built-in Admin tools allow you to backup & restore your OSes and fix OS problems by including basic disk checking, password changing, and a command shell.
    Leader badge
    4.8 out of 5 stars 16 Reviews
    Downloads: 28,002 This Week
    Last Update:
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  • 19
    net-snmp
    Net-SNMP provides tools and libraries relating to the Simple Network Management Protocol including: An extensible agent, an SNMP library, tools to request or set information from SNMP agents, tools to generate and handle SNMP traps, etc.
    Leader badge
    4.9 out of 5 stars 32 Reviews
    Downloads: 25,464 This Week
    Last Update:
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  • 20

    S.M.A.R.T. Monitoring Tools

    Disk Inspection and Monitoring

    smartmontools contains utility programs (smartctl, smartd) to control/monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (S.M.A.R.T.) built into most modern ATA and SCSI disks. It is derived from smartsuite.
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    4.4 out of 5 stars 38 Reviews
    Downloads: 25,338 This Week
    Last Update:
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  • 21
    BleachBit

    BleachBit

    deletes junk files to free disk space and improve privacy

    BleachBit frees disk space and maintains privacy. Cleans cache, Internet history, temporary files, logs, cookies, Firefox, Google Chrome, Flash, Windows, Linux, and more. Downloads are at www.bleachbit.org and source code is at GitHub.
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    4.8 out of 5 stars 60 Reviews
    Downloads: 18,082 This Week
    Last Update:
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  • 22
    antimicro

    antimicro

    Graphical program to map keyboard and mouse controls to a gamepad

    antimicro is a graphical program used to map keyboard keys and mouse controls to a gamepad. It's useful for using a gamepad on PC games that do not have any form of built-in gamepad support. This program can also be used to control any desktop application with a gamepad. On Linux, this means that your system has to be running an X environment in order to run this program. This program currently works with various Linux distributions, Windows (Vista and later), and FreeBSD, but with limited support for FreeBSD and Windows XP.
    4.4 out of 5 stars 17 Reviews
    Downloads: 3,975 This Week
    Last Update:
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  • 23
    Winux Operating System

    Winux Operating System

    Breathe New Life Into Your Computer - www.winux.is

    Keep your PC. Move to a modern desktop that still feels instantly familiar. Winux gives users a clean path forward with a familiar experience, strong everyday performance, and a smoother transition away from legacy operating systems on the computer you already own.
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    4.5 out of 5 stars 15 Reviews
    Downloads: 17,935 This Week
    Last Update:
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  • 24
    System Informer

    System Informer

    View and manage processes, services and more with this powerful tool

    System Informer is a free and open source process viewer. This multi-purpose tool will assist you with debugging, malware detection and system monitoring.
    Leader badge
    5.0 out of 5 stars 7 Reviews
    Downloads: 17,819 This Week
    Last Update:
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  • 25
    Process Hacker

    Process Hacker

    View and manage processes, services and more with this powerful tool.

    Process Hacker is a free and open source process viewer. This multi-purpose tool will assist you with debugging, malware detection and system monitoring.
    Leader badge
    4.7 out of 5 stars 139 Reviews
    Downloads: 13,836 This Week
    Last Update:
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