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

  • Find Hidden Risks in Windows Task Scheduler Icon
    Find Hidden Risks in Windows Task Scheduler

    Free diagnostic script reveals configuration issues, error patterns, and security risks. Instant HTML report.

    Windows Task Scheduler might be hiding critical failures. Download the free JAMS diagnostic tool to uncover problems before they impact production—get a color-coded risk report with clear remediation steps in minutes.
    Download Free Tool
  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

    Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
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  • 1
    Eraser

    Eraser

    A security tool to remove sensitive data from your Windows hard drive

    Eraser is a secure data removal tool for Windows. It completely removes sensitive data from your hard drive by overwriting it several times with carefully selected patterns.
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    Downloads: 9,632 This Week
    Last Update:
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  • 2

    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: 687 This Week
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  • 3
    WinLaunch

    WinLaunch

    macOS Launchpad for Windows

    WinLaunch provides a beautiful way to organize and access all of your important applications and documents. The overall style has been heavily influenced by Apples macOS Launchpad. WinLaunch is being actively developed and improved, my goal is to provide the best app launching experience available on Windows. You can now support the development of WinLaunch on Patreon for access to custom themes and priority feature requests https://www.patreon.com/WinLaunch
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    Downloads: 724 This Week
    Last Update:
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  • 4
    libusbK

    libusbK

    A complete software solution for windows usb devices

    libusbK is a complete driver/library solution for vendor class usb device interfaces. If you are a usb developer or usb device manufacturer seeking a driver solution for a new USB widget then libusbK could be for you. libusbK encompasses a 100% WinUSB compatible api/funtion set. All WinUSB power/pipe polices are fully supported by the libusbK driver. In Addition, libusbK has full support for isochronous endpoints and an extensive set of additional modules to simplify development. Source code repository using github: https://github.com/mcuee/libusbk
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    Downloads: 633 This Week
    Last Update:
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  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
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  • 5
    QTTabBar is extension for Windows Explorer that brings tabbed browsing to Microsoft's file browser, along with a host of other great features. Under new management! Now in public beta!
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    Downloads: 329 This Week
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  • 6
    RED searches and deletes empty directories recursively below a given start folder and shows the result in a well arranged tree. Further you can create some custom rules for keeping and deleting folders. Empty files in directories can also be ignored.
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    Downloads: 386 This Week
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  • 7
    RoboMirror's aim is to provide a very simple and user-centered GUI for Robocopy to allow for easy synchronization of two directory trees, e.g., to perform a robust incremental backup, both locally (e.g., to an external hard disk) and across the network. Additionally, RoboMirror supports volume shadow copies. By using shadow copies, all files can be copied, including files locked by running processes (Outlook, SQL Server...).
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    Downloads: 308 This Week
    Last Update:
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  • 8
    IsoCreator (could also be called Folder-to-ISO or Directory-to-ISO) C#.NET 2.0 application which creates ISO 9660 Joliet CD images from a given folder or volume. Can also create ISO with virtual files, given a tree representing a directory structure.
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    Downloads: 187 This Week
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  • 9
    An open-source emulator for the 3DO Game Console.
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    Downloads: 179 This Week
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  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
    Try it Free
  • 10
    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.
    Downloads: 116 This Week
    Last Update:
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  • 11
    Performance Maintainer

    Performance Maintainer

    cleans registry, cleanup disk, defrag drive

    Performance Maintainer has combined open source tools such as Little Registry Cleaner, Bleachbit and Ultradefrag that run periodically for PC maintenance and performance. It is very simple and automated 1.Little Registry Cleaner Scan and Cleans the registry, 2.Bleachbit Performs Disk Cleanup 3. Ultradefrag defragments System Drive. The Programs also allows to install additional tools for tweaking and better performance. The installer schedules the program to run according to your requirement. Requires .NET Framework 3.5 sp1.
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    Downloads: 55 This Week
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  • 12
    pngcrush and other tools for manipulating PNG (Portable Network Graphics) and MNG (Multiple-image Network Graphics) files.
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    Downloads: 156 This Week
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  • 13
    dotNet Disk Imager

    dotNet Disk Imager

    Lightweight RAW and ZIP disk images reader and writer to USB or SD

    IMPORTANT!!! Since this is new software, your web browser, operating system or even possibly antivirus software may report security alerts against this tool. Please ignore that messages until this tool gets widely spread. This program is highly inspired by Win32 Disk Imager and sort of copies it's function. However, I've added some features, like verification of readed/writed image file and the most important is on the fly support for zipped images. Another features worth mentioning are simultaneous write to multiple devices at one time or wiping of device filesystem and partitions. I would be happy to hear your feedback and I'm ready to listen to your suggestions. Feel free to request new features, if I found them interesting I will definitely implement them. Requires .NET Framework 4.6.1 (download here: http://go.microsoft.com/fwlink/?LinkId=671729 ) Supports Windows 7 and newer. If you need older Windows support, use Win32 Disk Imager. Please write a review.
    Downloads: 32 This Week
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  • 14
    AutoText

    AutoText

    Text expander(auto-type) application

    AutoText is a text expander(auto-typer) application that can minimize time that you spent typing phrases that your often use. You can bind an abbreviation(autotext) to some text snippet, phrase or sentence and that text will be automatically typed by AutoText each time you type the abbreviation. Keyboard keys press/hold/toggle is supported by using macros. AutoText works in any Windows program.
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    Downloads: 49 This Week
    Last Update:
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  • 15
    A Windows TFTP server and client written in the .NET framework using C#. Includes support for TFTP options, logging of TFTP requests to different sources including to a SQL server. A class is also available to include TFTP into your own program.
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    Downloads: 74 This Week
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  • 16
    SharpEnviro
    SharpEnviro is a GPL (Copyleft) Windows Shell Replacement created in Delphi.
    Downloads: 20 This Week
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  • 17
    Yet Another Duplicate File Remover
    Another duplicate file finder/remover. But this one is ULTRA FAST, safe, easy to use and of course free and open source.
    Downloads: 22 This Week
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  • 18
    Simple Network Management Protocol (SNMP) .Net library written in C# (csharp). Implements protocol version 1, 2 and 3
    Downloads: 15 This Week
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  • 19
    DracOS GNU/Linux Remastered
    What is DracOS GNU/Linux Remastered ? DracOS GNU/Linux Remastered ( https://github.com/dracos-linux ) is the Linux operating system from Indonesia , open source is built based on Debian live project under the protection of the GNU General Public License v3.0. This operating system is one variant of Linux distributions, which is used to perform security testing (penetration testing). Dracos linux in Arm by hundreds hydraulic pentest, forensics and reverse engineering. Use a GUI-based tools-tools the software using the CLI (command line interface) and GUI (graphical user interface) to perform its operations. Now Dracos currently already up to version 3.1.5 with the code name "KUNTILANAK WITH REMASTERED".
    Downloads: 23 This Week
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  • 20
    Ultimate Auto Typer
    This software is developed in C# using Visual Studio 2010. It act as an online bot.
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    Downloads: 64 This Week
    Last Update:
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  • 21
    BitBurner

    BitBurner

    BitBurner AVR Programmer, a full and complete AVRdude GUI for Windows.

    BitBurner AVR Programmer is a graphical front end for the command line program AVRdude. It is used to transfer programs and data to the Atmel AVR family of microcontrollers. BitBurner is an attempt at a single AVRdude GUI programming solution for AVR developers and experimenters by providing comprehensive device support over a broad range of programming hardware. BitBurner supports all devices, memory spaces and programming hardware protocols provided by the latest version of AVRdude, including support for XMEGA devices. BitBurner hosts a full-function hex editor capable of direct transfers to and from all memory spaces of all devices. BitBurner contains a complete fuse and lock calculator with an extensive database describing all AVRdude's supported devices and more. BitBurner has innovative automation functions intended to simplify and accelerate the build process. By monitoring project output files BitBurner can trigger programming actions without direct interaction.
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    Downloads: 18 This Week
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  • 22
    IP Subnet Calculator
    Administration of large networks could be a very time-consuming work. So this program should represent a comfortable solution for calculating subnets in IPv4-networks. First fo all it is designed for Windows but also executable under Linux/Mono.
    Downloads: 32 This Week
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  • 23
    A simple Windows (.NET Framework) program which can be used to test whether the keys on a keyboard are functional.
    Downloads: 16 This Week
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  • 24
    BCU SDK is a C based, high level development system for creating programs for EIB/KNX BCU devices. It includes the GNU toolchain for the m68hc05 architecture (m68hc05-gcc, m68hc05-gdb, newlib). Bus access is possible using multiple methods.
    Downloads: 12 This Week
    Last Update:
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  • 25
    Applet and .NET (C#) Framework for the Logitech G15 Keyboard to display Systeminformation on its LCD like CPU Usage, NetworkIO, DiskIO etc..
    Downloads: 10 This Week
    Last Update:
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