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

  • Level Up Your Cyber Defense with External Threat Management Icon
    Level Up Your Cyber Defense with External Threat Management

    See every risk before it hits. From exposed data to dark web chatter. All in one unified view.

    Move beyond alerts. Gain full visibility, context, and control over your external attack surface to stay ahead of every threat.
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  • Get the most trusted enterprise browser Icon
    Get the most trusted enterprise browser

    Advanced built-in security helps IT prevent breaches before they happen

    Defend against security incidents with Chrome Enterprise. Create customizable controls, manage extensions and set proactive alerts to keep your data and employees protected without slowing down productivity.
    Download Chrome
  • 1
    Deskflow

    Deskflow

    Share a single keyboard and mouse between multiple computers

    Deskflow is a lightweight productivity tool designed to streamline window and workspace management. It features hotkey-driven app launching, workspace switching, window snapping, search快捷启动, and minimal UI. Built with modern frameworks (likely Electron or Qt) and geared toward power users wanting efficient workflow control.
    Downloads: 71 This Week
    Last Update:
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  • 2
    TagSpaces

    TagSpaces

    TagSpaces is an offline, open source, document manager with tagging

    TagSpaces is a free, no vendor lock-in, open source application for organizing, annotating and managing local files with the help of tags. It features advanced note taking functionalities and some capabilities of to-do apps. The application is available for Windows, Linux, Mac OS and Android. We provide a web clipper extension for Firefox, Edge and Chrome for easy collecting of online content in the form of local files. File and folder management - TagSpaces provides a convenient user interface for browsing, viewing and man files and folders. The application supports two ways for tagging files. The default one embeds the tags directly in the name of the file, the other one uses a so called sidecar files for persisting the tags. The search functionality supports fuzzy functionality and can filter your locations for files and folders containing one or more tags.
    Downloads: 19 This Week
    Last Update:
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  • 3
    sigma-file-manager

    sigma-file-manager

    "Sigma File Manager" is a free, open-source, quickly evolving app

    "Sigma File Manager" is a free, open-source, quickly evolving, modern file manager (explorer/finder) app for Windows and Linux. Designed, developed, and maintained by Aleksey Hoffman | Twitter | Reddit. Create the best existing intelligent file manager & productivity app that will significantly speed up your workflow, provide you with advanced tools, and keep your data safe. Find any file/directory on your computer in just a few seconds. It also implements a typo correction system, allowing you to find files even when the search query includes typos, wrong case, wrong word order, missing words, missing symbols, and missing file extension. Create separate workspaces with their own tabs and pre-defined actions, allowing you to quickly switch between them. Actions can perform different operations, e.g. open a website, run a script, open a file in a specific program, etc.
    Downloads: 11 This Week
    Last Update:
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  • 4
    Batch-Create-Folders
    Introduction: This software can easily generate folders and subfolders in batch using a list. Instructions: This software is a portable version and does not require installation. Simply extract the exe and ico files to any location. Note that the software will not work without the ico file. Each line represents one folder name, and right-clicking on a line can generate a subfolders list for it. *Note that folder names cannot exceed 255 characters in length. Author: A_A Email: A_A_kent_leung@hotmail.com Donation: (Buy Me a Coffee) https://www.buymeacoffee.com/AAkent (PATREON) patreon.com/A_A_KENT (PAYPAL) https://www.paypal.com/paypalme/AAKENT
    Downloads: 18 This Week
    Last Update:
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  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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  • 5
    Helal Linux

    Helal Linux

    An Ubuntu based GNU/Linux system, suited for Muslim users.

    Helal Linux is an Ubuntu based distribution , it is main goal is to provide a modern, cool, and a stable Linux OS with a pre-installed system settings and software, supporting both Arab and Muslim users with many new features. The word "Helal" is an Arabic word meaning "Crescent" and translated literati from Arabic to English, it has nothing to do with "Halal" which is a something that you can do in Islam.
    Downloads: 6 This Week
    Last Update:
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  • 6
    twert

    twert

    Website, application blocking with scheduling. Self/Parental control.

    Anti-procrastination website and application blocker with scheduling. Perfect for students and parents alike. A free and open-source alternative to Cold Turkey. Made by Dang Nam Anh, Truong Duc Quan and Trieu Tran Duc Tri.
    Downloads: 11 This Week
    Last Update:
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  • 7
    SleepTimer

    SleepTimer

    On-screen system suspend timer

    A simple countdown timer to put the system to sleep. Similar to the Sleep function on TV sets.
    Downloads: 4 This Week
    Last Update:
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  • 8
    Desktop Timer

    Desktop Timer

    Desktop Timer is a countdown timer written on a cross-platform code.

    Desktop Timer is a Pascal code developed using Lazarus, a cross-platform RAD IDE available for WIndows, Mac, and Ubuntu (Linux). The source code can be compiled on several platforms.
    Downloads: 7 This Week
    Last Update:
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  • 9
    NeatShift

    NeatShift

    Advance File managing & relocating tool

    NeatShift is a Windows utility designed to solve a common problem: moving large applications, games, or folders to a different drive without breaking the shortcuts and application paths that depend on them. When a program is installed, its location is registered with the operating system. Simply moving the folder to a new drive will cause the program to stop working. NeatShift provides a robust solution by relocating the folder and then creating a Symbolic Link in its original place. This link is a powerful type of shortcut that is transparent to the operating system, redirecting any request from the old path to the new location seamlessly.
    Downloads: 3 This Week
    Last Update:
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  • The All-in-One Commerce Platform for Businesses - Shopify Icon
    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
    Learn More
  • 10
    Chrono Tasker

    Chrono Tasker

    Alarm clock, Timer and Stopwatch application

    Chrono Tasker allows the temporization of actions, both on the level of the OS and of the application itself. It is also used to manually stopwatch of some of the user’s activities, by specifying the beginning and the finish moment of the chronometration. Temporizable actions: - Running a file (program or script), of commands in Command Prompt and of actions such as turning the system off and restarting the computer, as well as returning to the login screen in Windows and logging off the current user. - Opening a document with the it’s type associated program (identified by the file extension) and of Internet addresses in the web browser. - Displaying a message; - Playing a beep or an audio file – chosen from a list or specified by the user.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 11

    Alarm

    A simple reminder tool for your pc.

    Reminds your important events, and also access the system uptime by simply mouse over on the icon in system tray.
    Downloads: 2 This Week
    Last Update:
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  • 12
    QuickHotkeys - Move &  Resize Windows

    QuickHotkeys - Move & Resize Windows

    Move & Resize Windows easily, productivity tricks, Mouse Gestures, ...

    Moving and resizing a window, with two mouse buttons, and more. 🎦 Check out the YOTUBE channel about this: https://www.youtube.com/playlist?list=PLVkS_eTsfH-sEFw55o5UkRK7uMNIyICXb 🏅Every Windows user should have this tool. You can't live without it. Install it and check all the cool features in action. ✅Moving a window in a straight line. ✅Going to the beginning and end of a page by turning the wheel. ✅Minimizing and maximizing windows with the wheel. ✅Quick copying and pasting. ✅Erasing all text on a line. ✅Moving the cursor to the beginning and end of a line ✅Sticking modifier keys for one second. 👈 ! Super cool stuff, check it out. Don't crooked your fingers when you press hotkeys anymore, dude. Only use one finger to press hotkeys ✅Remove the window title (👈 This way there's more room for content, the window without a header) ✅Setting transparency for windows ✅Fixing video files, where blocked rating, comment, and tags ✅ Change preview for video ✅ And more.
    Downloads: 2 This Week
    Last Update:
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  • 13
    pinvault-pro-extension

    pinvault-pro-extension

    AI-powered browser extension for bulk downloading Pinterest images wit

    PinVault Pro is a professional-grade browser extension that revolutionizes Pinterest image downloading with AI-powered technology. The extension provides intelligent bulk selection, auto-scroll functionality, and maintains HD quality downloads while respecting Pinterest's terms of service. 🎯 Core Features: • Visual checkbox overlays on Pinterest images for intuitive selection • AI-powered auto-scroll with smart content detection • Bulk download capabilities with real-time progress tracking • HD quality preservation in original resolution • Modern glassmorphism interface design • Privacy-focused architecture with no external servers • Cross-browser compatibility (Firefox, Chrome, Edge, Opera) • Real-time synchronization between popup and sidebar interfaces 🌍 Universal Browser Support: • Firefox: Official Mozilla Add-ons Store approval (61.4 KB package) • Chrome/Edge: Manifest V3 compatible (60.0 KB package) • Opera: Manifest V3 compatible (60.3 KB package)
    Downloads: 2 This Week
    Last Update:
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  • 14
    ASSA is a UNIX/Linux Object-Oriented C++ networking (BSD sockets) library and application framework based on Adaptive Communication Patterns. ASSA is designed to improve productivity of writing network-oriented client/server applications.
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    Downloads: 3 This Week
    Last Update:
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  • 15
    DeneDown

    DeneDown

    Timed Sleep/Hibernate/Shutdown/Restart Tool

    Sets your PC to sleep, hibernate, shutdown, or restart based on your time setting. Time may be set between 1 minute to 24 hours (in 1 minute increments). Countdown timer displays time remaining until the action occurs. This is a combined x64/x86 version. (Note: Tool is idle when time reads 0 hr:0 mins) Consider Windows 10 has changed the console "shutdown.exe" command to be active only for 30 minutes max. With DeneDown, you can extend your sleep/shutdown/hibernation period much longer, as it was in previous Windows versions. This is particularly useful when you are leaving your system to let it image the drives, but do not want to leave your PC on after completing the imaging.
    Downloads: 3 This Week
    Last Update:
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  • 16
    SimpleCron

    SimpleCron

    Simple Scheduler for Windows clients configured by a crontab-like file

    Simple scheduler utility for Windows PCs which executes specified commands at specified times / days for the currently logged-in user. The specification of actions follows widely the crontab syntax as e.g. described in https://en.wikipedia.org/wiki/Cron. Missed tasks will always be started at the next possible time, i.e. at the next system startup. Installation: * Install the Java runtime environment in at least version 1.8 (if not already installed). You can download it from https://www.java.com/download. * Select some program folder (e.g. C:\Program Files (x86)), download SimpleCron.zip there, and unpack it (=> <ProgramFolder>\SimpleCron). * Execute (by double clicking) InstallSimpleCron.vbs (this will establish the work folder C:\Users\<user>\AppData\Local\SimpleCronSimpleCron, create an entry in the Startup (AutoStart) folder, and start SimpleCron) * SimpleCron will (after start) remind you to edit the crontab as soon as possible.
    Downloads: 3 This Week
    Last Update:
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  • 17
    Divergence Meter Alarm Clock
    An alarm clock based on the anime "Steins;Gate". Enjoy!
    Downloads: 1 This Week
    Last Update:
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  • 18
    Text Line Duplicate Remover

    Text Line Duplicate Remover

    Remove duplicate lines from your text

    This standalone offline web browser tool helps you remove duplicate lines from your text, with additional text processing options. Simply open it in your browser by double-clicking the html file. It also includes the source code too. I made this when I was working with long lists of entries and needed something to automatically clean them up. As a bonus you can also change the Sentence Case of the text, make it lowercase, UPPERCASE or Sentence case.
    Downloads: 1 This Week
    Last Update:
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  • 19
    ZynKo

    ZynKo

    ZynKo é um aplicativo que mantém a atividade do computador.

    ZynKo é um aplicativo gratuito que mantém a atividade do computador mesmo quando o usuário está ausente. Ele simula movimentos do mouse, digitação de palavras aleatórias ou personalizadas, e cliques na tela — tudo de forma configurável e segura.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 20
    Driver and tools for Pegasus Mobile Notetaker
    Downloads: 1 This Week
    Last Update:
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  • 21
     rims-arduino-library

    rims-arduino-library

    Recirculation infusion mash system library for Arduino

    This library implement RIMS controls for home brewers. For definition of a RIMS, see https://tinyurl.com/j3lyuyc For me, an Arduino micro controller + a LCD Keypad shield was cheaper and a lot more customizable than a commercial PID controller. So, with this library, a commercial PID controller is unnecessary. Automatic PID tuning toolkit is also included. Temperature can be read with a thermistor, a resistance temperature detector (RTD) or any custom temperature probe. Heater is controlled with pulse-width modulation (PWM) of a solid-state relay (SSR). Documentation : https://tinyurl.com/y7579v6a
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    .NET ShutMan
    The .NET ShutMan project is a shutdown manager. You can create a countdown-timer and the program shutdown your pc when the timer is expired (up to 36 hours)! Important: You need the .Net Framework 4.0!
    Downloads: 0 This Week
    Last Update:
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  • 23
    Development of a fully designed alarm clock implemented on the Xilinx Spartan3 board.
    Downloads: 0 This Week
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  • 24

    BischuLoop

    Plays selected MP3 alerts between 1-15 seconds

    Use BischuLoop to choose a sound notification to alert you at a set interval (between 1-15 seconds) to remind you to look at your minimap. You can use any MP3 sound file and I've set the defaults to Google Android notification sounds. Idea came from Bischu who hated the timer he used when learning.
    Downloads: 0 This Week
    Last Update:
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  • 25
    Cerebro

    Cerebro

    Open-source productivity booster with a brain

    Cerebro is an open source electron-based productivity software that lets you search and see everything you need on your PC in one place. With just a few clicks you can search on your machine or on the internet everything you need; see everything you need without having to open another application; and easily find and use what you want.
    Downloads: 0 This Week
    Last Update:
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