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

  • Passwordless Authentication and Passwordless Security Icon
    Passwordless Authentication and Passwordless Security

    Identity is everything. Protect it with Duo.

    It’s no secret — passwords can be a real headache, both for the people who use them and the people who manage them. Over time, we’ve created hundreds of passwords, it’s easy to lose track of them and they’re easily compromised. Fortunately, passwordless authentication is becoming a feasible reality for many businesses. Duo can help you get there.
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  • Build Securely on Azure with Proven Frameworks Icon
    Build Securely on Azure with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
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  • 1
    PKHeX

    PKHeX

    Pokémon Save File Editor

    Pokémon core series save editor, programmed in C#. Data is displayed in a view that can be edited and saved. The interface can be translated with resource/external text files so that different languages can be supported. Pokémon Showdown sets and QR codes can be imported/exported to assist in sharing. PKHeX expects to save files that are not encrypted with console-specific keys. Use a save data manager to import and export save data from the console (Checkpoint, save_manager, JKSM, or SaveDataFiler). We do not support or condone cheating at the expense of others. Do not use significantly hacked Pokémon in battle or in trades with those who are unaware hacked Pokémon are in use. PKHeX is a Windows Forms application that requires .NET Framework v4.6, with experimental support for .NET 6.0. The executable can be built with any compiler that supports C# 10.
    Downloads: 52 This Week
    Last Update:
    See Project
  • 2

    KPEnhancedEntryView

    An enhanced entry view panel for KeePass

    This is a plugin to KeePass <http://www.KeePass.info> to provide an enhanced entry view. For the rationale and design behind this project, see the forum post linked to as the homepage
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    Downloads: 243 This Week
    Last Update:
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  • 3

    WebAutoType

    Adds support to KeePass AutoType for URL matching

    This is a plugin to KeePass <http://www.KeePass.info> to allow the AutoType functionality to work with browser URLs as well as window titles. If integration with KeePass Check for Updates is required, install http://sourceforge.net/projects/kpsfupdatechecker
    Leader badge
    Downloads: 258 This Week
    Last Update:
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  • 4
    ZPLDesigner

    ZPLDesigner

    A Zebra Programming Language (ZPL) IDE with embedded viewer

    ZPLDesigner is a free and easy-to-use software utility that allows you to create, preview and print label based on Zebra Programming Language (ZPL). ZPL commands ZPL Designer can help you to write ZPL code. The left panel provides a list of the main ZPL commands used to design a label. By hovering the mouse pointer over the desired ZPL command, a detailled description will be displayed on the top "Help" panel. Clicking on it will add this command to the ZPL editor. ZPL Viewer By pressing F5 or clicking on Preview button, ZPL Designer will display the result of you ZPL code on a Preview tab. You will be able to zoom/unzoom, rotate or save the generated label as an image. You can choose how to render your ZPL code: a local Zebra printer or by using the labelary.com webservice. An industrial ZPL printer with embedded website and network is required when you choose to use "Local Zebra Printer" as renderer.
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    Downloads: 391 This Week
    Last Update:
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  • Our Free Plans just got better! | Auth0 by Okta Icon
    Our Free Plans just got better! | Auth0 by Okta

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

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  • 5
    mpv.net

    mpv.net

    mpv.net is a modern media player for Windows that works just like mpv

    mpv.net is a modern desktop media player for Windows based on the popular mpv player. mpv.net is designed to be mpv compatible, almost all mpv features are available because they are all contained in libmpv, this means the official mpv manual applies to mpv.net. mpv focuses on the usage of the command line and the terminal, mpv.net retains the ability to be used from the command line and the terminal and adds a modern Windows GUI on top of it. Video output that is capable of many features loved by videophiles, such as video scaling with popular high-quality algorithms, color management, frame timing, interpolation, HDR, and more. Leverages the FFmpeg hwaccel APIs to support DXVA2 video decoding acceleration. mpv.net is based on libmpv which offers a straightforward C API that was designed from the ground up to make mpv usable as a library and facilitate easy integration into other applications. mpv is like VLC not based on DirectShow or Media Foundation.
    Downloads: 51 This Week
    Last Update:
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  • 6
    PDFsharp

    PDFsharp

    PDFsharp is a .NET library for creating and modifying PDF documents.

    PDFsharp moved to https://github.com/empira/PDFsharp PDFsharp is a .NET library for creating and modifying Adobe PDF documents programmatically from any .NET language like C# or VB.NET. PDFsharp defines classes for the objects found in PDF files, so you never have to deal with IDs or references directly. The downloads include MigraDoc Foundation, a .NET library for creating documents on the fly (supports PDF and RTF). PDFsharp is the .NET library that easily creates and processes PDF documents on the fly from any .NET language. The same drawing routines can be used to create PDF documents, draw on the screen, or send output to any printer. MigraDoc Foundation is the .NET library that easily creates documents based on an object model with paragraphs, tables, styles, etc. and renders them into PDF, XPS, or RTF.
    Leader badge
    Downloads: 224 This Week
    Last Update:
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  • 7
    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.
    Leader badge
    Downloads: 235 This Week
    Last Update:
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  • 8
    EasyModbusTCP/UDP/RTU .NET

    EasyModbusTCP/UDP/RTU .NET

    Modbus TCP, UDP and Modbus RTU client/server library

    Modbus TCP, Modbus UDP and Modbus RTU client/server library for .NET Supports Function Codes: - Read Coils (FC1) - Read Discrete Inputs (FC2) - Read Holding Registers (FC3) - Read Input Registers (FC4) - Write Single Coil (FC5) - Write Single Register (FC6) - Write Multiple Coils (FC15) - Write Multiple Registers (FC16) V5.6: Upload lates version - This will probably the last version for .NET Framework 4.0 - The next Version will be based on new .NET5 and redesigned V5.5: Bugfixes and MQTT Bridge removed V5.0: Major Bugfixes and Event Handlers changed V4.4 HF1: Bugfix excessive CPU-Load Modbus TCP Server V4.4: Bugfix Modbus RTU and MQTT V4.3: Bugfixes Modbus RTU Webview for Modbus Server Simulator and MQTT functionality for Server
    Leader badge
    Downloads: 227 This Week
    Last Update:
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  • 9

    Emgu CV

    Emgu CV is a cross platform .Net wrapper for OpenCV

    Emgu CV is a cross platform .Net wrapper to the OpenCV image processing library. Allowing OpenCV functions to be called from .NET compatible languages such as C#, VB, VC++, IronPython etc. The wrapper can be compiled in Mono and run on Windows, Linux, Mac OS X, iPhone, iPad and Android devices.
    Leader badge
    Downloads: 212 This Week
    Last Update:
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  • Red Hat Enterprise Linux on Microsoft Azure Icon
    Red Hat Enterprise Linux on Microsoft Azure

    Deploy Red Hat Enterprise Linux on Microsoft Azure for a secure, reliable, and scalable cloud environment, fully integrated with Microsoft services.

    Red Hat Enterprise Linux (RHEL) on Microsoft Azure provides a secure, reliable, and flexible foundation for your cloud infrastructure. Red Hat Enterprise Linux on Microsoft Azure is ideal for enterprises seeking to enhance their cloud environment with seamless integration, consistent performance, and comprehensive support.
    Learn More
  • 10
    AutoMouser - AUTO MOUSE & KEYBOARD 100+

    AutoMouser - AUTO MOUSE & KEYBOARD 100+

    AutoMouser is FREE AUTO MOUSE & KEYBOARD clicker. 100+ FEATURES

    AutoMouser is the best FREE AUTO MOUSE & KEYBOARD clicker. 100+ GREAT FEATURES and all free! Try it and you will love it! View screenshots!
    Leader badge
    Downloads: 388 This Week
    Last Update:
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  • 11
    Grassroots DICOM

    Grassroots DICOM

    Cross-platform DICOM implementation

    Grassroots DiCoM is a C++ library for DICOM medical files. It is accessible from Python, C#, Java and PHP. It supports RAW, JPEG, JPEG 2000, JPEG-LS, RLE and deflated transfer syntax. It comes with a super fast scanner implementation to quickly scan hundreds of DICOM files. It supports SCU network operations (C-ECHO, C-FIND, C-STORE, C-MOVE). PS 3.3 & 3.6 are distributed as XML files. It also provides PS 3.15 certificates and password based mecanism to anonymize and de-identify DICOM datasets.
    Leader badge
    Downloads: 208 This Week
    Last Update:
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  • 12
    ModAssistant

    ModAssistant

    Simple Beat Saber Mod Installer

    ModAssistant is a simple PC mod installer for Beat Saber, using mods from BeatMods. Beat Saber is the popular VR rhythm game where players must slash the beats as they fly towards them to the beat of lively music. ModAssistant comes with a number of great features like dependency resolution, mod uninstallation, and a complex theming engine. It features light, dark, BSMG and light pink themes, and can even have your own custom theme! Have more fun playing Beat Saber by customizing your experience with ModAssistant!
    Downloads: 39 This Week
    Last Update:
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  • 13
    AAX to MP3

    AAX to MP3

    Audible AAX to MP3 Converter

    Usage: - Install the Audible Manager and open a file of your account. - Sign in into your audible account (in the application). Now the program can convert your audible files. - Start Aax2Mp3 (AaxToMp3GUI.exe) and select the file you want to convert. - Click the Convert button. - The buttons are grayed out and it shows how far the conversion has progressed. - - The time should always continue to increase. - If the buttons are clickable again, the conversion is completed. The mp3 file is now to be found in the same folder as the AAX file. The conversion need (depending on the computing power) for 1 minute of audio approximately 2 seconds. The conversion of Aax to MP3 is fast, free, and requires no I-Tunes. Have fun while listening! If you want to help developing this software, please contact me. I do not have enough time to develop alone.
    Leader badge
    Downloads: 191 This Week
    Last Update:
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  • 14
    LibreHardwareMonitor

    LibreHardwareMonitor

    Libre Hardware Monitor, home of the fork of Open Hardware Monitor

    LibreHardwareMonitor is a hardware monitoring tool that provides real-time data on system temperatures, fan speeds, and voltages across PC components.
    Downloads: 36 This Week
    Last Update:
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  • 15
    Reflexil

    Reflexil

    The .NET Assembly Editor

    Reflexil is an assembly editor and runs as a plug-in for Red Gate's Reflector, ILSpy and Telerik's JustDecompile. Reflexil is using Mono.Cecil, written by Jb Evain and is able to manipulate IL code and save the modified assemblies to disk. Reflexil also supports C#/VB.NET code injection. With advanced injection techniques (injecting a property will generate proper field and getter/setter for you). Easily update embedded, linked, or assembly-linked resources. Babel, CliSecure, CodeVeil, CryptoObfuscator, DeepSea, Dotfuscator, Reactor, Eazfuscator, Goliath, Skater, SmartAssembly, Spices, and Xenocode! Use C# or VB.NET to patch method behavior, then save the assembly to disk. Reverse engineering made easy! Create, update or delete IL instructions with all supported operands like type, field or method references (using a browser for selecting the suitable element).
    Downloads: 36 This Week
    Last Update:
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  • 16
    Banish crusty code with the Uncrustify C/C++/C#/D/Java/Pawn source code beautifier. It indents, adds newlines, aligns, etc, and is highly configurable.
    Leader badge
    Downloads: 179 This Week
    Last Update:
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  • 17

    NppMenuSearch

    Search Notepad++ menu items and preference settings

    Plugin development moved to GitHub: https://github.com/peter-frentrup/NppMenuSearch. Binaries continue to be served here. Notepad++ Menu Search Plugin This plugin adds a text field to the toolbar for searching menu items and preference dialog options. The plugin is inspired by a similar Visual Studio 2012 functionality. It is written in C# using the approach described in http://sourceforge.net/projects/notepad-plus/forums/forum/482781/topic/4404278
    Leader badge
    Downloads: 204 This Week
    Last Update:
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  • 18
    An open-source emulator for the 3DO Game Console.
    Leader badge
    Downloads: 214 This Week
    Last Update:
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  • 19
    CSV Lint

    CSV Lint

    CSV Lint plug-in for Notepad++ for syntax highlighting

    CSV Lint plug-in for Notepad++ for syntax highlighting, csv validation, automatic column and datatype detecting fixed width datasets, change datetime format, decimal separator, sort data, count unique values, convert to xml, json, sql etc. A plugin for data cleaning and working with messy data files. Use CSV Lint for metadata discovery, technical data validation, and reformatting on tabular data files. It is not meant to be a replacement for spreadsheet programs like Excel or SPSS, but rather it's a quality control tool to examine, verify or polish up a dataset before further processing.
    Downloads: 34 This Week
    Last Update:
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  • 20
    SaveParser

    SaveParser

    Total War Savegame Editor / Parser

    Savegame editor for Total War games savegames. Supports Total War "Warhammer 2", "Warhammer", "Attila", "Rome 2", "Shogun 2", "Napoleon" and "Empire" savegame files, Includes also some tools which could be needed for developer for savegame-based application.
    Leader badge
    Downloads: 245 This Week
    Last Update:
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  • 21

    IEDExplorer

    IEC61850 IED Explorer in .net

    IEDExplorer is an IEC 61850 client tool written for testing and educational purposes. IEDExplorer can connect to an IEC61850 device (also called an IED) over MMS (ISO/IEC9506-1 and ISO/IEC 9506-2) communication protocol. The tool is written in pure C# including the MMS ASN.1 parser (based on BinaryNotes ASN.1 tool) and runs in .net environment, on Windows. Linux/Mono support has been lost on the way (volunteers welcome). See Features for what the tool can do for you. I will appreciate your help in testing and extending the tool!
    Leader badge
    Downloads: 205 This Week
    Last Update:
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  • 22
    smtp4dev

    smtp4dev

    The fake smtp email server for development and testing

    smtp4dev - the fake SMTP email server for development and testing. A dummy SMTP server for Windows, Linux, Mac OS-X (and maybe elsewhere where .NET Core is available). Lets you test your application without spamming your real customers.
    Downloads: 33 This Week
    Last Update:
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  • 23
    ShellNewHandler is an Open-Source Tool to enable/disable ShellNew entries, aka New File context menu entries from Windows Explorer in Vista and Windows 7. Check or uncheck items to enable a desktop right-click context menu item. No need to install.
    Leader badge
    Downloads: 166 This Week
    Last Update:
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  • 24
    ClipAngel

    ClipAngel

    Clipboard history capture and paste tool

    This program belongs to class "Clipboard Manager". It captures many clipboard objects and allows user to select and paste one in any program. Inspired by analogs: ClipDiary, Ditto, AceText. Main priorities: usability, compatibility, reliability. Requires .Net Framework 4.52+ (Windows Vista+/Server 2008+)
    Leader badge
    Downloads: 151 This Week
    Last Update:
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  • 25
    PDFCreator

    PDFCreator

    Converts every printable document to PDF, JPG, PNG, TIF and more

    PDFCreator creates professional PDFs with just a few clicks and it's free. PDFCreator comes with many professional features to merge documents, send emails, and more. PDFCreator easily creates PDFs from any Windows program. Use it like a printer in Word, Excel, or any other Windows application. A PDF takes less storage space, and is easier to send with email. Make PDF creator part of your the software suite you have installed on your computer for easy PDF creation. PDFCreator also comes with a COM programming interface that allows to integrate PDFCreator in other applications and a server mode to share PDFCreator on a network.
    Leader badge
    Downloads: 873 This Week
    Last Update:
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