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

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  • 1
    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.
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    Downloads: 32,230 This Week
    Last Update:
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  • 2
    Pandora Open

    Pandora Open

    Open Source Monitoring System for performance and availability.

    Pandora OPEN is a high-performance, 100% open-source monitoring ecosystem, born as the independent evolution of the Pandora FMS community branch after version 777. Licensed under GPLv2, it provides a modular and sovereign platform for supervising networks, servers, and applications without commercial dependencies. It features multi-platform agents, remote monitoring (SNMP, WMI, HTTP), GIS maps, and advanced visual dashboards. Entirely maintained by the community on GitHub, it ensures total transparency, technical flexibility, and absolute freedom for system administrators.
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    Downloads: 1,573 This Week
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  • 3
    UltraDefrag

    UltraDefrag

    Increase your system performance with this easy to use tool

    Please note, here you can find the latest open source release of UltraDefrag (7.1.4). The most recent UltraDefrag release (15.0.0) can be found on our official website: https://ultradefrag.net UltraDefrag is a disk defragmenter for Windows, which supports defragmentation of locked system files by running during the boot process. It is easy to use without any complicated scripting or a huge load of configuration settings. You can filter the files processed by size, number of fragments, file name and path. You can terminate the process early by specifying an execution time limit.
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    Downloads: 845 This Week
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  • 4
    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: 854 This Week
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  • 5
    Polarity Browser

    Polarity Browser

    A fast, secure, stable web browser powered by Chromium and Trident.

    Polarity is a dual engine browser powered by both Chromium and Trident that focuses on system efficiency by bringing low RAM and low CPU usage. This browser was also programmed to be optimized for Windows with an Android version available. Browse the web with an uncomplicated UI that is highly customizable with themes, apps, and extensions from the Polarity Store, GreasyFork, OpenUserJS, and UserStyles. Polarity also comes with a built in password manager which safely encrypts all data to prevent theft. Polarity also comes with a built in adblocker and privacy tools such as proxy/VPN support and header masking to prevent further tracking online. If you appreciate all the hard work that we put into creating and developing Polarity, please consider giving a small donation at: https://polaritybrowser.netlify.com/donate
    Downloads: 79 This Week
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  • 6
    Disk Cleaner
    Disk Cleaner is a tool to quickly and easily free disk space that is used by temporary files like the system temporary folder, the Internet Explorer Cache and Cookies folder, and the Recycle Bin. It can be expanded with simple text-based plug-ins.
    Downloads: 41 This Week
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  • 7
    Bacula
    Bacula is a set of computer programs that permit managing backup, recovery, and verification of computer data across a network of computers of different kinds. Based on Source Forge downloads, Bacula is the most popular Open Source backup program.
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    Downloads: 202 This Week
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  • 8
    Tria Sistema Operatiu

    Tria Sistema Operatiu

    Helps you find, download & burn the best Operating System for any PC

    Tria O.S. detects hard & soft specs of the PC where you run it, you can load this info or specify it manually to let the program inform you what would be the best operating system for a specific PC, with the specified hardware, and then see the difference by adding RAM, a SSD hard drive, changing the graphics card ... etc. REQUIREMENTS: For Linux, you need GAMBAS 3.3 or later, so you will have to install the gambas3 package before installing. 90's EDITION needs 160 MB (192 MB on a virtual machine) of RAM and works with Windows 95 and Windows NT 4.0. BRONTOSAURUS EDITION needs DirectX 9.0c and .Net Framework 2.0 and runs on Windows 98, Windows 98 SE, Windows ME & Windows 2000. XP EDITION requires .Net Framework 4.0 or newer. Runs on Windows XP, Vista, Server 2003, 2003 R2, Home Server and Server 2008. STANDARD EDITION needs .Net Framework 4.8 or 4.8.1 and runs on Windows 7, Windows Server 2008 R2, and newer (any Windows released from 2009 until today).
    Downloads: 19 This Week
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  • 9
    phpSysInfo
    phpSysInfo is a customizable PHP Script that parses /proc, and formats information nicely. It will display information about system facts like Uptime, CPU, Memory, PCI devices, SCSI devices, IDE devices, Network adapters, Disk usage, and more.
    Downloads: 8 This Week
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  • 10
    xpy
    xpy is a small software, securing your Windows 2000/XP/2003 installation and protecting your privacy. In addition to so-called Antispy features, it disables common security threats (RPC/DCOM, LMHash) and increases your Windows performance.
    Downloads: 10 This Week
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  • 11
    LogRotateWin

    LogRotateWin

    Implementation of logrotate utility for Windows Platform

    This is a Windows implementation of the logrotate utility found in Linux platforms. The goal is to use the same command line parameters and files as the Linux version. You can help support my efforts by buying me a coffee! https://buymeacoffee.com/kenasalter If you are going to give a negative rating, please take a little extra time and explain why. I want to improve the program as much as possible, but I need feedback. Thank you! Source code is available on GitHub: https://github.com/plecos/logrotatewin Available on Chocolately: https://community.chocolatey.org/packages/LogRotate/ And available on Chef Supermarket: https://supermarket.chef.io/cookbooks/windows_logrotate
    Downloads: 14 This Week
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  • 12
    THIS PROJECT HAS BEEN ABANDONED SINCE 2007, NO SUPPORT WILL BE PROVIDED. Winpooch is a watchdog for Windows (2000, XP, 2003, but only 32-bits). It detects modifications in your system, so as to detect a trojan or a spyware installation. It also includes a real-time anti-virus. Set your own security level for anti-spyware, ant
    Downloads: 6 This Week
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  • 13
    Open Menu+ is an alternative Start Menu with more options, better features (like quick search), and a more intuitive design. For Tablet PC users, it can open with a mouse-over. Open Menu+ Portable is an advanced portable app launcher.
    Downloads: 16 This Week
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  • 14
    Startup Manager is a program that provides you the possibility to manage the Windows startup procedure. It offers you the possibility to control which programs automatically start up and more.
    Downloads: 2 This Week
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  • 15
    Wake On Lan

    Wake On Lan

    A powerful WOL, ping, shutdown, GUI application.

    ATTENTION!!! Wol is now hosted on our own servers at http://wol.aquilatech.com. Wake On LAN, WakeOnLAN, shutdown software for Windows. A powerful WOL, ping, shutdown, GUI application.
    Downloads: 2 This Week
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  • 16
    GeoShell is a Windows Shell Replacement. It replaces the standard 'Start Menu', 'Desktop', 'Task Bar' and 'system tray' of windows with a smaller, faster, and more configureable program, with an extensible bar-oriented minimal interface.
    Downloads: 2 This Week
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  • 17
    Lan Core is a free & open source software that lets you to build a thin client network on a Windows operating system. It was originally designed to work in a server or workstation with Windows XP Professional using the native remote desktop protocol.
    Downloads: 2 This Week
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  • 18
    RunAsAdmin Explorer Shim is a tool that lets administrators to keep and easily use their administrative rights but still enjoy safety of using least privileged accounts.
    Downloads: 3 This Week
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  • 19
    CyBerFuN xBTiT
    CyBerFuN xBTiT by cybernet2u / I only install hacks and maintain them / all the credits for the core source goes to : http://www.btiteam.org new files here ->https://github.com/cybyd/cybyd
    Downloads: 0 This Week
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  • 20
    Ganib | Project Management Software

    Ganib | Project Management Software

    Open Source, tasks, bug tracking, agile scrum, timesheet, wiki

    Ganib gives simpler ways to keep your projects organized and on track. Take advantage of easy features that help you quickstart and makes your team more efficient and productive. Open source Web based online agile project management collaboration software free, J2EE platform, MySql database with project dashboards & reporting. Organized Teams & Projects: Easily plan & manage projects with intuitive features to help your team deliver on time. Quickly focus on what's important, easily select actions to take. Be efficient for everyday work, project tasks, important details, and timelines. Tasks: Set milestones, tasks, subtasks with duration and dependencies to teams better organized. Scrum: Communicate effectively with your team using scrum, wikis & discussions to make better decisions. ​ Timesheet & Tracking: Track the time spent in real time using gTrack desktop tool with desktop screenshots. Bug Tracking: Manage bugs. Demo: http://www.ganib.com
    Downloads: 0 This Week
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  • 21
    Zpanel Online is a browsed by Hosting Controle Panel for Hosting Company's you can easly add your own customers with there own domain. with a Reseller Hosting or a Domain User, you dont need to buy any high priced software for your Hosting Company.
    Downloads: 0 This Week
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