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
    ophcrack

    ophcrack

    A Windows password cracker based on rainbow tables

    Ophcrack is a Windows password cracker based on a time-memory trade-off using rainbow tables. This is a new variant of Hellman's original trade-off, with better performance. It recovers 99.9% of alphanumeric passwords in seconds.
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    Downloads: 4,148 This Week
    Last Update:
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  • 2
    libjpeg is a free software library written for JPEG image compression.
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    Downloads: 782 This Week
    Last Update:
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  • 3
    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: 121 This Week
    Last Update:
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  • 4
    Interlocking system for modular model railroading. The goal is the development of hard- and software for an model interlocking interfacing on the one hand to the model railroad and on the other to the model of the userinterface of an real interlocking.
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    Downloads: 136 This Week
    Last Update:
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    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

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  • 5
    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: 15 This Week
    Last Update:
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  • 6
    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: 18 This Week
    Last Update:
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  • 7

    hpsx64

    Highly-Experimental Playstation Simulator x64

    Highly-Experimental Playstation Simulator for x64 based systems. This is a WORK IN PROGRESS.
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    Downloads: 25 This Week
    Last Update:
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  • 8
    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: 11 This Week
    Last Update:
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  • 9
    Wintel based platform system power management and analysis utilities.
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    Downloads: 41 This Week
    Last Update:
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  • Go from Code to Production URL in Seconds Icon
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  • 10
    OpenSAF
    Open Source High Availability Middleware Generally Based on SA Forum Specifications
    Downloads: 28 This Week
    Last Update:
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  • 11
    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: 27 This Week
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  • 12
    NTK Ultra-Compression

    NTK Ultra-Compression

    Logiciel de compression de fichiers maximal indépendant du temps.

    Le logiciel NTK Ultra-Compression répond à une problématique essentielle de l’ère numérique : comment réduire la taille des données à leur minimum absolu sans compromis sur leur intégrité, tout en s’affranchissant des contraintes temporelles ? Dans un monde où les volumes de données explosent et où les solutions actuelles de compression restent limitées par des compromis entre rapidité, efficacité et complexité, nous proposons une approche disruptive. Les solutions actuelles, telles que le format ZIP ou 7z, bien qu’efficaces, atteignent leurs limites en termes de taux de compression et d’efficacité pour les fichiers volumineux ou complexes. Ces outils sont souvent contraints par des compromis entre rapidité d’exécution et efficacité de stockage. Cette approche disruptive s’adresse notamment aux utilisateurs ayant besoin de manipuler des fichiers volumineux, comme les logiciels, les jeux vidéo ou les bases de données, où chaque octet économisé compte.
    Downloads: 6 This Week
    Last Update:
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  • 13
    Back Orifice XP is a network remote administration tool, gives control of the system, network, registry, passwords, file system, and processes. Based in BO2K 1.1 but with a new plugin architecture.
    Downloads: 12 This Week
    Last Update:
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  • 14
    This project is to develop an installer package for a python key logger I modified for stealth use It will be packaged with NSIS for distribution on portableapps.com and elsewhere. it will fit on a usb key and provide quick and easy key logging on the go
    Downloads: 5 This Week
    Last Update:
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  • 15
    This is a character and items editor for the game Diablo 2 (D2). This also features updates for the expansion pack Diablo 2 LOD. Features include stat editor, money, inventory, and gem upgrade system. Donations are needed and will soon be accepted!
    Downloads: 7 This Week
    Last Update:
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  • 16
    The Wizard's Apprentice is an application that allows you to ask questions from a script. It uses Windows dialog boxes in the so-called Wizard style: dialogs asking one question at a time, with a Back button, a Next button and a Cancel button.
    Downloads: 4 This Week
    Last Update:
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  • 17
    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: 6 This Week
    Last Update:
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  • 18
    PicBurner is a complete solution for programming Microchip PIC microcontrollers and maybe other microcontrollers and EEPROMs. The software will be build in Borland DS 2006, personality C++ and hardware will support RS232 and USB interfaces.
    Downloads: 3 This Week
    Last Update:
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  • 19
    xinco - Document Management System, DMS
    xinco [eXtensibe INformation COre] is a powerful Web-Service based Information and Document Management System (DMS) for files, text, URLs and contacts, featuring ACLs, versioning, full text search, an FTP-like client (easy install, J2EE+MySQL/PostgreSQL)
    Downloads: 1 This Week
    Last Update:
    See Project
  • 20
    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: 5 This Week
    Last Update:
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  • 21
    The GK3 Tools project is a collection of tools and utilities useful for viewing and modifying the Gabriel Knight 3 data files.
    Downloads: 5 This Week
    Last Update:
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  • 22
    This project will host a service which will contain virtual packages (using MS App Virtualization and SVS technologies) of most common Open source apps. Kindly use the tracker to suggest for opensource applications which we shall publish.
    Downloads: 1 This Week
    Last Update:
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  • 23
    Thanks to carefully thought out architecture an emulator for all hardware (i386 i860 sparc hppa SGI Mips Alpha etc) on any hardware. A lot of new theories have gone into this trying to fix old problems.
    Downloads: 4 This Week
    Last Update:
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  • 24
    OPEN BootKnife is a boot collection. It's main purpose is to provide users with a collection of tools, apps, & operating systems. Inspired by grub4dos, OPEN BootKnife hopes to be the only boot disk you will ever need.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 25
    process runtime detection with xml / image statistic output - like xfire .com
    Downloads: 4 This Week
    Last Update:
    See Project
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