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.

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  • 1
    Yet Another (remote) Process Monitor
    Yet Another Process Monitor (YAPM) is a powerful process viewer for Windows that monitors the services & processes, their modules, threads, handles, windows, TCP/UDP connections... etc. running on local system or on any of the computers on your network.
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    Downloads: 200 This Week
    Last Update:
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  • 2
    BRL-CAD

    BRL-CAD

    Open Source Solid Modeling CAD

    BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
    Downloads: 88 This Week
    Last Update:
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  • 3
    This is an opensource project for the calculation of the mathematical constant Pi. If you are a mathematician or programer please contribute ideas or code for this project. Non professionals are also welcome to contribute.
    Downloads: 48 This Week
    Last Update:
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  • 4
    bbwin
    BBWin is a Windows agent for Xymon Server. It is written in C++ with boost library and use WiX to generate msi installer. It is should be compatible with big-brother server also.
    Downloads: 13 This Week
    Last Update:
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  • 5
    Wintel based platform system power management and analysis utilities.
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    Downloads: 32 This Week
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  • 6
    An easy to use Development Environment for OS developers to design, write, compile, test, and publish new or existing OS projects with ease.
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    Downloads: 29 This Week
    Last Update:
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  • 7
    Simple Shutdown Scheduler
    Simple Shutdown Scheduler (also named 'SSS') is a light and useful tool to schedule shutdowns/reboots/... for any computer in your network. It's free, open source, light, simple to use, secure and it ALWAYS WORKS.
    Downloads: 4 This Week
    Last Update:
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  • 8
    Plugins for the Code::Blocks IDE to support interpreted languages. File Manager and Tools+ plugins are now part of Code::Blocks contrib. Code in SVN. Active development is at github.com/spillz/codeblocks-python. SVN here is no longer maintained.
    Downloads: 12 This Week
    Last Update:
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  • 9
    Emu10k1 sound driver
    Downloads: 2 This Week
    Last Update:
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  • 10
    WinDS

    WinDS

    Windows XP reimplemented on Nintendo DS

    WinDS is a Reimplementation of the OS Windows(R) XP(R) on the Platform Nintendo DS. Since i started coding Apps for the NDS, my goal was to write a program, called WinDS, which does (nearly) the same as the real appy by Microsoft. In contrast to other little NDS-Operating Systems, just like Woopsi etc. you can code your own Application in Lua for WinDS: just copy the Code onto the FAT-Disk and execute it from within WinDS! This is what makes WinDS so unique. The New Beta 0.95 is out, it features - 52 Classes that are already available within Lua - 25 different types of user interface classes - 8 different predefined dialogs which makes it the perfect GUI sandbox for DS. PS: More time without update means: next update will have even more improvements, as i am still developing ;)
    Downloads: 9 This Week
    Last Update:
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  • 11
    IMPORTANT NOTE: This project has moved to Github: https://github.com/pkozelka/libxml2-pas Pascal units accessing the popular XML API from Daniel Veillard ( http://www.xmlsoft.org ). This should be usable at least from Kylix and Delphi, but hopefully also from other Pascal compilers (like freepascal).
    Downloads: 2 This Week
    Last Update:
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  • 12
    FileStructureToHTML literally creates an .html file for mp3´s, videos and more of your selected drive or a specific directory. The files can be organized in a tree, listing or in a table. Gain a whole new way of viewing your file list.
    Downloads: 6 This Week
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  • 13
    Dreamos is an operating system developed on Sega Dreamcast to be ported to an array of embedded devices. The goal of the project is to be able to run non-ported Unix programs on the Sega Dreamcast and other embedded devices with ease and POSIX compliance
    Downloads: 4 This Week
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  • 14
    TailBlazer is a graphical version of the UNIX 'tail' utility. It allows you to monitor log files as they are written. New lines appear as they are written. TailBlazer takes this a step further by supporting pattern matching, filtering, and notification
    Downloads: 4 This Week
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  • 15
    Process Sniper
    Process Sniper is a light tool which allows to get information about a specific process by dragging the mouse on one of its windows. Process Sniper can also kill, set priority/affinity, pause/resume the process... etc.
    Downloads: 2 This Week
    Last Update:
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  • 16
    Two way communication from any Excel, PowerPoint, Word application to Linux. The Brain is a custom TCP server, running under Linux, capable of accepting multiple connections from VBA objects and redistributing or storing the information in real-time.
    Downloads: 3 This Week
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  • 17
    Netwatcher Elite is a Windows filesharing monitor. It will tell you know when user connect to your file shares, what files they've connected to, and even kick them off if you want to. In addition, support is planned for remote monitoring and stastics.
    Downloads: 3 This Week
    Last Update:
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  • 18
    The Prolog Expert System Shell (PESS) is a software that generates ES using basically two components: Knowledge Base, used by the ES to guide its decisions making, and Inference Machine, cable of collection the rules and generating new facts.
    Downloads: 3 This Week
    Last Update:
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  • 19
    A pure-Java compression library suitable as a drop-in replacement to current native implementations of java.util.zip. Typical scenarios where it is useful are applets, where access to native code is not allowed. It may also be useful on platforms where it
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    Downloads: 3 This Week
    Last Update:
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  • 20
    Clock XP is a .NET time synchronization client (SNTP) with plugin support. It's designed to operate on Windows 2000, XP and Windows Vista.
    Downloads: 2 This Week
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  • 21
    With this project I intend to write a really, really simple OS, just for fun and learning. I think I will never have a really usable version, as I said, that's no my objective.
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    Downloads: 2 This Week
    Last Update:
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  • 22
    This program emulates in windows the way linux uses its clipboard, this means, when you select any text with your it�s automatically copied to the clipboard and using the middle button of your mouse you can paste it where you want.
    Downloads: 2 This Week
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  • 23
    Prota is a reference implementation for an open source "3D web" protocol.
    Downloads: 2 This Week
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  • 24
    Revival/2k is a modular BBS/suite of internet servers and a web-site management system. It consists of multiple web applications (forums, mail, login, etc), internet servers (NNTP, POP3, etc) and a Telegard/Renegade styled telnet server all interacting
    Downloads: 1 This Week
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  • 25
    STEMCalc IV - Mathematics Swiss Knife

    STEMCalc IV - Mathematics Swiss Knife

    The Fourth Edition of STEMCalc and the biggest one yet!

    +++DISCLAIMER+++ The project is still currently in beta, thus have bare functionality, and possible bugs. Anyone who can spare time and lend a helping hand as a beta-tester is very appreciated. Contact the author for more information. +++INTRO+++ STEMCalc IV is a simple, yet powerful, console-programmed calulator written in Java, performing one calculation with two numbers max at a time and other various functions. +++STORY+++ This is the fourth edition of the previously abandoned student project STEMCalcR. The project has never seen the light of day due to various bugs and lack of usability, even after attempts at reviving the project in the forms of STEMCalcR2 and R3Boot editions. Determined, not giving up, me, one of the original co-authors of STEMCalcR, has brought to you STEMCalc IV, the swiss knife of mathematics. I am determined to drive this project further, turning it into a powerful program , more than just your average calculator.
    Downloads: 1 This Week
    Last Update:
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