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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    Automate contact and company data extraction

    Build lead generation pipelines that pull emails, phone numbers, and company details from directories, maps, social platforms. Full API access.

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  • 1
    LAME (Lame Aint an MP3 Encoder)

    LAME (Lame Aint an MP3 Encoder)

    A high quality MP3 encoder

    LAME is an educational tool to be used for learning about MP3 encoding. The goal of the LAME project is to improve the psycho acoustics, quality and speed of MP3 encoding. Note: we provide source code only!
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    Downloads: 18,925 This Week
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  • 2
    XBian

    XBian

    XBian is a small, fast and lightweight media center linux distro

    XBian is a free, Open Source media center distribution for mini computers (currently Raspberry Pi, Solidrun's CuBox-i/Hummingboard supported). It can be downloaded at http://www.xbian.org. Our slogan is "bleeding edge" as our main focus is delivering the fastest media center solution. We believe that everyone can help make XBian better. Please visit our website for support and if you have suggestions, wishes or contributions, please share them with us! Want more info about XBian? You can read everything about it here: http://www.xbian.org/what-is-xbian/
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    Downloads: 5,762 This Week
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  • 3

    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: 866 This Week
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  • 4

    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: 778 This Week
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  • Field Sales+ for MS Dynamics 365 and Salesforce Icon
    Field Sales+ for MS Dynamics 365 and Salesforce

    Maximize your sales performance on the go.

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  • 5
    winPenPack

    winPenPack

    The portable software collection

    winPenPack is a project that aims at collecting the most frequently used and most popular open source applications made portable, so that they can be executed without installation from any USB Flash Drive or Hard Disk. The winPenPack suites offer a wide range of portable applications like office tools, internet tools, multimedia tools, development tools, security applications and other frequently used utilities. Everything you need, completely free, open source and portable!
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    Downloads: 635 This Week
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  • 6
    cdrtfe

    cdrtfe

    Burn optical discs in various formats

    cdrtfe is a CD/DVD/BD burning application for Microsoft Windows. You can burn data discs, Audio CDs, XCDs, (S)VCDs and DVD-Video discs. It supports creation and writing of ISO images and bootable discs. cdrtfe has a multi-language interface and is also available as portable version.
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    Downloads: 542 This Week
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  • 7
    Data Crow

    Data Crow

    The ultimate cataloguer

    Data Crow allows you to use the standard movie & video (divx, xvid, DVD, Blu-ray, etc), book (and eBooks), images, board games, comic books, games & software, music (mp3 and other music files) cataloguing modules. Besides these modules, which you can change to fit your requirements, you can create new modules (want to catalogue your stamps, equipment, or anything else?). The GUI is skinnable. Reporting (using JasperReports and their community edition JasperSoft Developer Studio ), loan administration, item importing & exporting, backup & restore and many other optional features are waiting for you.
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    Downloads: 348 This Week
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  • 8
    Steam Tinker Launch

    Steam Tinker Launch

    Linux wrapper tool for use with the Steam client for custom launch

    Steam Tinker Launch is a versatile Linux wrapper tool for use with the Steam client which allows for easy graphical configuration of game tools, such as GameScope, MangoHud, modding tools, and a bunch more. It supports both games using Proton and native Linux games and works on both X11 and Wayland. An incredible wrapper with a menu that lets you easily toggle and modify various settings for games on Linux. Anything from proton versions to startup and exit scripts, proton/dxvk/etc. settings, FSR, reshade, and even options for various tools like game mode, replay-sorcery, game scope, etc. Tons more too. I just set my default proton version to "steam tinker launcher" and then every game launches with a 2-second menu that allows you to easily change any of the settings. If you don't press any buttons it just goes with the defaults and launches the game.
    Downloads: 72 This Week
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  • 9
    Finds problems in MP3 files and helps the user to fix many of them using included tools. Looks at both the audio part (VBR info, quality, normalization) and the tags containing track information (ID3.) Also includes a tag editor and a file renamer.
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    Downloads: 351 This Week
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  • Nonprofit Budgeting Software Icon
    Nonprofit Budgeting Software

    Martus Solutions provides seamless budgeting, reporting, and forecasting tools that integrate with accounting systems for real-time financial insights

    Martus' collaborative and easy-to-use budgeting and reporting platform will save you hundreds of hours each year. It's designed to make the entire budgeting process easier and create unlimited financial transparency.
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  • 10
    EtchDroid

    EtchDroid

    An application to write OS images to USB drives, on Android

    EtchDroid is an open-source application that writes disk images to USB drives. Use it to make a bootable operating system USB drive when your laptop is dead.
    Downloads: 61 This Week
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  • 11
    FLAC is a free lossless compressed audio format which supports streaming and archival. The FLAC project maintains the format and provides a reference encoder/decoder and input plugins for several popular audio players.
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    Downloads: 236 This Week
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  • 12
    mulder

    mulder

    MuldeR's OpenSource Projects

    OpenSource development since 2004. Featured projects: * LameXP - audio encoder front-end * MPlayer for Windows - custom MPlayer installer for Win32 * Simple x264 Launcher - simple GUI front-end for x264 * Many more...
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    Downloads: 462 This Week
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  • 13
    Xtreme Download Manager

    Xtreme Download Manager

    Powerfull download accelerator and video downloader

    Xtreme Download Manager is a powerful tool to increase download speed up to 500%, save streaming videos from websites, resume broken/dead downloads, and schedule and convert downloads. XDM seamlessly integrates with Google Chrome, Mozilla Firefox Quantum, Opera, Vivaldi and other Chromium and Firefox-based browsers, to take over downloads and saving streaming videos from web. XDM has a built-in video converter which lets you convert your downloaded videos to different formats so that you can watch them on your mobile or TV (100+ devices are supported) XDM can download streaming content from most websites. The best way of downloading webpage embedded videos from the Internet is here. After installing XDM, the "Download Video" button pops up whenever you are watching a video anywhere in the Internet. Just click on the button to start downloading clips. XDM supports all popular browsers including Google Chrome, Firefox Quantum, Vivaldi, Opera and many other browsers on Windows.
    Downloads: 48 This Week
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  • 14
    Tools and plugins related to bart's PEBuilder
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    Downloads: 284 This Week
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  • 15
    Cemu Graphic Packs

    Cemu Graphic Packs

    Community Graphic Packs for Cemu

    Use Cemu's built-in graphic packs downloader (a feature added in Cemu 1.15.1) to automatically retrieve the newest graphic packs from our repository. Remove all of your graphic packs first, then move all of the folders from a downloaded .zip below to the graphicPacks folder from your Cemu folder. Choose one of the 3 downloads from above. Each download has a range of versions it supports, pick the one that’s supported by your downloaded Cemu version. Some graphic packs might not be available for Cemu 1.14.0 and newer while previous versions did have graphic packs. This is due to the full reimplementation of the texture system in Cemu 1.14.0. This also changed a lot of the aspects with textures and made all previous graphic packs that changed textures outdated.
    Downloads: 32 This Week
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  • 16
    OpenAuto

    OpenAuto

    AndroidAuto headunit emulator

    OpenAuto is an AndroidAuto(tm) headunit emulator based on aasdk library and Qt libraries. Main goal is to run this application on the RaspberryPI 3 board computer smoothly. The OpenAuto Pro is the most advanced Raspberry Pi-based, custom head-unit solution ready to retrofit your vehicle. The main functionality of the OpenAuto Pro software is to bring Users access to modern head-unit features like Bluetooth Hands-Free Profile, music streaming, integrated media player, navigation via Android Auto, screen mirroring, rear camera support, and many more interesting options and possibilities. Moreover, OpenAuto Pro runs under regular Raspberry PI OS (Buster), therefore You can use all accessories and software dedicated to Raspberry Pi. OpenAuto Pro version provides features like brightness control, volume control, support of Kodi and integration with the Raspberry PI OS (Raspbian Desktop).
    Downloads: 31 This Week
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  • 17
    Zipkin

    Zipkin

    Distributed tracing system to gather timing data

    Zipkin is a distributed tracing system. It helps gather timing data needed to troubleshoot latency problems in service architectures. Features include both the collection and lookup of this data. If you have a trace ID in a log file, you can jump directly to it. Otherwise, you can query based on attributes such as service, operation name, tags and duration. Some interesting data will be summarized for you, such as the percentage of time spent in a service, and whether or not operations failed. The Zipkin UI also presents a Dependency diagram showing how many traced requests went through each application. This can be helpful for identifying aggregate behavior including error paths or calls to deprecated services. Applications need to be “instrumented” to report trace data to Zipkin.
    Downloads: 31 This Week
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  • 18
    libmms is a library for downloading (streaming) media files using the mmst and mmsh protocols.
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    Downloads: 287 This Week
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  • 19
    FileBot

    FileBot

    The ultimate TV and Movie Renamer / Subtitle Downloader

    FileBot is the ultimate tool for renaming your movies, tv shows or anime and downloading subtitles. It's smart, streamlined for simplicity and just works. FileBot supports Windows, Linux and Mac, plus there's a full-featured command-line interface for all sorts of automation.
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    Downloads: 122 This Week
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  • 20
    TTA Lossless Audio Codec
    Lossless compressor for multichannel 8,16 and 24 bits audio data, with the ability of password data protection. Being 'lossless' means that no data/quality is lost in the compression - when uncompressed, the data will be identical to the original.
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    Downloads: 114 This Week
    Last Update:
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  • 21
    xBRZ

    xBRZ

    xBRZ: "Scale by rules" - high quality image upscaling filter by Zenju

    xBRZ is a high-quality image upscaling filter for creating beautiful HD representations from low-resolution images. Reference implementations for common emulators can be found in the download section: ● DOSBox ● ePSXe ● HqMAME ● ScummVM ● Snes9x ● Kega Fusion http://sourceforge.net/projects/xbrz/files/ Test the xBRZ scaler with your own images and compare against other scalers with the "Scaler Test" tool: http://sourceforge.net/projects/xbrz/files/ScalerTest_1.1.zip
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    Downloads: 189 This Week
    Last Update:
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  • 22
    Game Extractor

    Game Extractor

    Open and edit the archive files used in over 5200 games.

    Reads and writes archives used in many popular games. Great for mod development and game translations. Supports over 5200 games, with more games added through small plugins. Also shows file previews and converts them to different formats.
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    Downloads: 525 This Week
    Last Update:
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  • 23
    VisiPics

    VisiPics

    Find and/or delete duplicate photos on Windows

    VisiPics is a free program that finds and deletes duplicate images on Windows. It works by processing folders you specify and searching for groups of duplicate images. You can use three different filters to find duplicate images: Strict: Returns almost identical results Basic: Returns results with more differences Loose: Returns results with much more differences
    Downloads: 149 This Week
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  • 24
    FLAC Frontend

    FLAC Frontend

    The new, updated front-end for FLAC!

    As Speek's celebrated FLAC Frontend hasn't been updated for 10 years, things started to get a little buggy with new Windows versions. This remake fixes most issues. FLAC Frontend is a convenient way for Windows users not used to working with command lines to use the official FLAC tools. It accepts WAVE, W64, AIFF and RAW files for encoding and outputs FLAC or OGG-FLAC files. It is able to decode FLAC files, test them, fingerprint them and re-encode them. It has drag-and-drop support too.
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    Downloads: 212 This Week
    Last Update:
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  • 25
    WinLIRC
    WinLIRC, the Windows port of the Linux Infrared Remote Control package. Control your computer via remote!
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    Downloads: 111 This Week
    Last Update:
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