Open Source C# Software

C# Software

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.

  • 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.
    Try free now
  • Automate contact and company data extraction Icon
    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.

    Generate leads at scale without building or maintaining scrapers. Use 10,000+ ready-made tools that handle authentication, pagination, and anti-bot protection. Pull data from business directories, social profiles, and public sources, then export to your CRM or database via API. Schedule recurring extractions, enrich existing datasets, and integrate with your workflows.
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  • 1
    KeePass

    KeePass

    A lightweight and easy-to-use password manager

    KeePass Password Safe is a free, open source, lightweight, and easy-to-use password manager for Windows, Linux and Mac OS X, with ports for Android, iPhone/iPad and other mobile devices. With so many passwords to remember and the need to vary passwords to protect your valuable data, it’s nice to have KeePass to manage your passwords in a secure way. KeePass puts all your passwords in a highly encrypted database and locks them with one master key or a key file. As a result, you only have to remember one single master password or select the key file to unlock the whole database. And the databases are encrypted using the best and most secure encryption algorithms currently known, AES and Twofish. See our features page for details.
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    Downloads: 222,478 This Week
    Last Update:
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  • 2
    Firebird

    Firebird

    A powerful, cross platform, SQL database system

    Firebird RDBMS offers ANSI SQL features & runs on Linux, Windows & several Unix platforms. Features excellent concurrency & performance & powerful stored procedure & trigger language. More information and downloads at https://firebirdsql.org/, issue tracker is https://github.com/FirebirdSQL/firebird/issues
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    Downloads: 4,295 This Week
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  • 3
    SharpDevelop

    SharpDevelop

    A free IDE for C#, VB.NET, & Boo projects on Microsoft's .NET platform

    SharpDevelop is the open-source IDE for the .NET platform. Write applications in languages including C#, VB.NET, F#, IronPython and IronRuby, as well as target rich and reach: Windows Forms or WPF, as well as ASP.NET MVC and WCF. It starts from USB drives, supports read-only projects, comes with integrated unit and performance testing tools, Git, NuGet and a lot more features that make you productive as a developer.
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    Downloads: 547 This Week
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  • 4
    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.
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    Downloads: 843 This Week
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  • Try the cloud dialer that managers trust and employees love to use. Icon
    Try the cloud dialer that managers trust and employees love to use.

    Revolutionize your contact center with CallTools

    Boost your agents’ productivity and enhance customer engagement like never before with CallTools’ powerful suite of call center features, including predictive dialing, call recording, and multi-touch campaigns with email and SMS capabilities. Get a complete 360-degree view of your agents’ performance and take advantage of real-time reporting. With seamless integration options, advanced queue management, and flexible IVR settings, CallTools ensures a streamlined workflow. Effortlessly manage data targeting and caller ID strategies to optimize connection rates and improve outcomes. Empower your team with a user-friendly interface designed to simplify complex tasks while delivering consistent results.
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  • 5
    AutoWikiBrowser is a semi-automated Wikipedia editor, designed to make tedious, repetitive tasks quicker and easier. For more information, see the project homepage at http://en.wikipedia.org/wiki/Wikipedia:AutoWikiBrowser.
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    Downloads: 76 This Week
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  • 6

    DirectShow .NET

    DirectShow programming library for .Net programmers

    .NET c# directshow lib, capture and playback using c# and directshow
    Downloads: 51 This Week
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  • 7
    NetworkMiner packet analyzer

    NetworkMiner packet analyzer

    The Network Forensics Tool

    NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows that can detect the OS, hostname and open ports of network hosts through packet sniffing or by parsing a PCAP file. NetworkMiner can also extract transmitted files from network traffic. New versions of NetworkMiner are released exclusively on www.netresec.com since version 2.0 of NetworkMiner. This page on SourceForge is only kept to provide hosting of older versions of the software. To get the latest version of NetworkMiner, please visit: http://www.netresec.com/?page=NetworkMiner
    Downloads: 47 This Week
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  • 8
    SQLite.org took over this project in 2010
    Downloads: 40 This Week
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  • 9
    SCCM Client Center
    The tool is designed for IT Professionals to troubleshoot SMS/SCCM Client related Issues. The SCCM Client Center provides a quick and easy overview of client settings, including running services and SCCM settings in a good easy to use, user interface. Project has moved to: https://sccmclictr.codeplex.com/
    Downloads: 32 This Week
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  • ND Wallet is a fully customizable, white label crypto wallet solution designed for businesses that want to launch their own secure, non-custodial wallet quickly. Icon
    ND Wallet is a fully customizable, white label crypto wallet solution designed for businesses that want to launch their own secure, non-custodial wallet quickly.

    Scalable blockchain development for Web3 apps, wallets, NFTs, and more

    ND Wallet supports multiple blockchains (Bitcoin, Ethereum, Solana, Polygon, TRON, etc.), major token standards (ERC-20, TRC-20, SPL), and NFTs. Built with MPC technology and end-to-end encryption, the wallet ensures full user control over private keys, while also offering optional KYC/AML integration.
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  • 10
    File system/directory monitoring utilities with loggin and task processing support (can execute files or make a WCF service call). Multiple configuration options. Source code libraries can be used to create a custom file system monitor.
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    Downloads: 36 This Week
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  • 11
    A pronounceable password generator plugin for KeePass. NOTE: This project has been discontinued. It hasn't been worth it to maintain the project for a while now, so no more updates will be made to the plugin. The algorithm this plugin uses is based off FIPS-181 which was withdrawn by NIST a while back. The proliferation of password managers that seamlessly run on multiple platforms (some of which are free) has also removed almost all advantages of using randomly generated pronounceable passwords. If you have a use case for this plugin, reconsider it. If you still think using randomly generated pronounceable passwords are worth it for your use case, reconsider it some more.
    Downloads: 22 This Week
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  • 12
    Sudo for Windows (sudowin) allows authorized users to launch processes with elevated privileges using their own passphrase. Unlike the runas command, Sudo for Windows preserves the user's profile and ownership of created objects.
    Downloads: 15 This Week
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  • 13
    iSpy Camera Security Software

    iSpy Camera Security Software

    Worlds leading motion detection, recording and alerting software

    iSpy uses your USB webcams, IP cams, capture cards, desktops and microphones to detect and record movement or sound and provides security, surveillance, monitoring and alerting services. Media is recorded directly to H264 mp4 files or AVI files. iSpy can stream live and recorded video over the local network, over the web using the ispyconnect portal and to mobile devices and third party software (like gadgets and MediaPortal). iSpy also includes a server project that lets you connect to USB webcams and microphones running on other computers. iSpyConnect provides subscription based SMS, MMS, Email, YouTube uploads and Remote Access. LAN usage of iSpyConnect is free.
    Downloads: 56 This Week
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  • 14
    AK SMS Sender

    AK SMS Sender

    GSM Modem based sms sending tool

    GSM modem based bulk sms sending tool. Mobile number and message can be imported from Microsoft Excel Worksheet (xlsx) and Text (txt) files to send sms using any GSM modem or phone connected with pc through usb or serial interface.
    Downloads: 9 This Week
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  • 15
    LogRotateWin

    LogRotateWin

    Implementation of logrotate utility for Windows Platform

    This is a Windows implementation of the logrotate utility found in Linux platforms. The goal is to use the same command line parameters and files as the Linux version. You can help support my efforts by buying me a coffee! https://buymeacoffee.com/kenasalter If you are going to give a negative rating, please take a little extra time and explain why. I want to improve the program as much as possible, but I need feedback. Thank you! Source code is available on GitHub: https://github.com/plecos/logrotatewin Available on Chocolately: https://community.chocolatey.org/packages/LogRotate/ And available on Chef Supermarket: https://supermarket.chef.io/cookbooks/windows_logrotate
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    Downloads: 18 This Week
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  • 16
    Airfox

    Airfox

    Airfox is a free and fast web browser. It uses the Gecko Engine.

    Airfox is a fast, consistent, reliable, secure, private and independent web browser. Developed in the Microsoft .NET Runtime Environment, Airfox uses the Gecko Engine also seen in some well-known browsers such as Firefox, Waterfox, Pale Moon. Some advanced features such as Reliable Download Manager are not available due to restrictions from the GeckoFX runtime, but as seen from the results of the futuremark, acid 3 & acid 2 tests, Airfox’s scores/rankings are merit. We are just asking to support us by downloading Airfox and giving it a try. We promise that V2 will be just as good as the other famous browsers. We just want you to follow us on this journey. We want you to follow us on this quest. The quest for true browsing speed. The quest for an uncluttered web. The quest of YOUR ideal web . Download it at http://www.airfox.sourceforge.net
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    Downloads: 10 This Week
    Last Update:
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  • 17
    Stars! Nova
    Stars! Nova is a clone of the classic 4X space strategy game Stars!. While nowhere near the functionality of Stars! quite a few features have been implemented so far. See the Nova web page for details.
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    Downloads: 4 This Week
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  • 18
    Easy Feed Editor
    ACTIVE DEVELOPMENT ENDED IN 2011. Use Easy Feed Editor to create your own feed. Easy Feed Editor supports both RSS and ATOM.
    Downloads: 7 This Week
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  • 19
    The “Save as DAISY XML” add-in was created through an open source project with Microsoft, Sonata Software Ltd. and the Digital Accessible Information System (DAISY) Consortium and can be downloaded on sourceforge.
    Downloads: 4 This Week
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  • 20
    STD Foundation Classes

    STD Foundation Classes

    Object oriented frameworks - PowerBuilder, PowerServer & InfoMaker!

    by Chris Pollach (http://chrispollach.blogspot.ca) A fully integrated "object oriented" set of PB Classes for the following products: PowerBuilder, PowerClient & PowerServer. The framework greatly enhances the development process by making the PowerBuilder developer significantly more productive! License: https://sourceforge.net/projects/stdfndclass/files/License (Open Source) => Updated version of the STD "Integrated" framework 2025R1 build 2025.1.0.436 was released to production on 2025-06-09. https://sourceforge.net/projects/stdfndclass/files/FrameWork/Integrated => The STD "Web Service" framework 2022R2 build 2021.2.0.106 is the last release to production on 2021-05-12. This PB feature is now discontinued as of PB 2021 https://sourceforge.net/projects/stdfndclass/files/FrameWork/WebService => Updated version of the STD "Order Entry" example App 2025R1 build 2025.1.0.626 was released on 2025-05-29. https://sourceforge.net/projects/stdfndclass/files/Applications
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    Downloads: 9 This Week
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  • 21
    A graphical Windows ping utility written in C# that allows you to log and graph ICMP respones from multiple hosts. Includes a C# class library for ICMP and ping to use in your own program.
    Downloads: 8 This Week
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  • 22
    "Password Hook" is a Window Password Filter DLL that sends any Windows password changes to a script/program, stored in the registry by a configuration utility. The DLL is effectively a generic windows password filter.
    Downloads: 4 This Week
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  • 23
    OW.NET -- 1-Wire API port from Java (and J#) to C#. Use the Dallas 1-Wire and iButton chips with standard C# using a serial adapter (also CF.net) or the TMEX drivers on the Windows platform. No J# distribution installation required.
    Downloads: 3 This Week
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  • 24
    RemoteCalendars is a COM-.NET Add-in for Outlook 2003/2007, written in C#. After installing this plugin, every Outlook user should be able to subscribe, reload and delete a generic remote iCalendar (RFC 2445) from Outlook 2003/2007.
    Downloads: 1 This Week
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  • 25
    Memba Velodoc XP Edition is the open source core of the Velodoc platform for publishing, sharing, sending and transferring large files. It is constituted of ASP.NET Ajax server controls, modules and handlers for uploading and downloading large files.
    Downloads: 5 This Week
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