Open Source C# Software

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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.

  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

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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: 330,153 This Week
    Last Update:
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  • 2
    Bulk Crap Uninstaller

    Bulk Crap Uninstaller

    Remove large amounts of unwanted applications quickly.

    Bulk Crap Uninstaller (in short BCUninstaller or BCU) is a free (as in speech and beer) bulk program uninstaller with advanced automation. It excels at removing large amounts of applications with minimal to no user input, while requiring next to no technical knowledge. It can detect most applications and games (even portable or not registered), clean up leftovers, force uninstall, automatically uninstall according to premade lists, and much more. Bulk Crap Uninstaller is licensed under Apache 2.0 open source license, and can be used in both private and commercial settings for free and with no obligations, as long as no conditions of the license are broken.
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    Downloads: 8,198 This Week
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  • 3
    Pidgin IM

    Pidgin IM

    A universal instant messaging (IM) program

    See https://pidgin.im/about/ for more information. Pidgin is an instant messaging program which lets you log in to accounts on multiple chat networks simultaneously. It runs on Windows, Linux, and other UNIX operating systems. Pidgin is compatible with the following chat networks out of the box: AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, MXit, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr. It is written in C and makes heavy use of GLib and GTK+. Finch is a command line instant messaging program. It also lets you log in to accounts on multiple chat network simultaneously, and it is compatible with the same chat networks as Pidgin. It is written in C and makes heavy use of GLib and ncurses.
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    Downloads: 5,099 This Week
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  • 4
    AstroGrep

    AstroGrep

    A Windows File Searching Utility (grep)

    AstroGrep is a Microsoft Windows GUI File Searching (grep) utility. Its features include regular expressions, versatile printing options, stores most recent used paths and has a "context" feature which is very nice for looking at source code.
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    Downloads: 693 This Week
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  • $300 in Free Credit Towards Top Cloud Services Icon
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  • 5
    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: 585 This Week
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  • 6
    GUI Turbo Assembler (TASM)

    GUI Turbo Assembler (TASM)

    An essential 32-64bit localized IDE for Assembly Language with Debuger

    GUI Turbo Assembler is an essential IDE for assembly language programming. It includes Borland Turbo Assembler (TASM), Turbo Linker, Turbo Debugger and DOSBox for writing both 16-bit and 32-bit programs in assembly language. GUI Turbo Assembler provides a rich set of features, encompassing fundamental file operations and advanced capabilities such as line numbering, syntax highlighting, code folding, docking, and theme personalization. The interface is highly adaptable, empowering users to modify the environment and configure default settings for Borland Turbo Assembler and Turbo Linker. GUI Turbo Assembler supports localization in seven different languages and enables users to create and utilize their own localized files. Additionally, users have the opportunity to contribute those in the GitHub project. It also packs a terminal which allows user to take complete control of their programming. Additionally, users have the opportunity to contribute those in the GitHub projec
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    Downloads: 841 This Week
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  • 7
    NAPS2 - Not Another PDF Scanner

    NAPS2 - Not Another PDF Scanner

    Scan documents to PDF and other file types, as simply as possible.

    Visit NAPS2's home page at www.naps2.com. NAPS2 is a document scanning application with a focus on simplicity and ease of use. Scan your documents from WIA- and TWAIN-compatible scanners, organize the pages as you like, and save them as PDF, TIFF, JPEG, PNG, and other file formats. Available on Windows, Mac, and Linux. NAPS2 is currently available in over 40 different languages. Want to see NAPS2 in your preferred language? Help translate! See the wiki for more details.
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    Downloads: 549 This Week
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  • 8
    PNotes
    PNotes is light-weight, flexible, skinnable manager of virtual notes on your desktop. It supports multiple languages, individual note's settings, transparency and scheduling. Absolutely portable as well - no traces in registry. PNotes.NET edition requires .NET framework 4 Client Profile
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    Downloads: 223 This Week
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  • 9
    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+)
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    Downloads: 183 This Week
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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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  • 10
    Terra Incognita

    Terra Incognita

    GPS mapping and management software

    Program for downloading web source maps or local files maps for various programs or GPS devices. Terra Incognita™ main features: navigating through map by simple clicking generating OziExplorer, Kmz, JNX, GPSdash or TrekBuddy calibrated map file possibility to use many web map sources Google Maps™, Bing™, Open street map ... managing of waypoints or tracks saved in gpx and many other formats selected user defined map area for saving simplified and easy user interface downloading and saving maps on background automatic split of very large areas to many smaller map files
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    Downloads: 175 This Week
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  • 11
    Provides optical character recognition (OCR) solutions for Vietnamese language.
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    Downloads: 151 This Week
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  • 12
    GEDKeeper

    GEDKeeper

    GEDKeeper - opensource and crossplatform genealogy management program

    GEDKeeper program is developed for work with personal genealogical database. The program is designed for extremely simple and intuitive interface. The program is very easy to install on the computer, fully supports the GEDCOM format, has no restrictions on the number of persons and generations, allows you to generate pedigrees, building several tree species, as well as print and save their images, provides fast navigation, filtering, searching and adding multimedia materials. In addition there is an output of geographic data on Google maps (© Google). The aim of the program is as quick and effective means of conducting personal genealogical database. We invite native speakers to improve the translation of the program on the Crowdin platform: https://crowdin.com/project/gedkeeper Project is published on GitHub, url: https://github.com/Serg-Norseman/GEDKeeper
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    Downloads: 126 This Week
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  • 13
    IAW Scan 2
    Diagnostic application for Magneti-Marelli IAW 8F/16F/18F/04K ECUs written in C# for .NET 2.0
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    Downloads: 48 This Week
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  • 14
    Sucrose

    Sucrose

    Sucrose Wallpaper Engine

    Sucrose is a versatile wallpaper engine that brings life to your desktop with a wide range of interactive wallpapers.
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    Downloads: 94 This Week
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  • 15
    RSS Bandit

    RSS Bandit

    Browsing web news without a browser

    RSS Bandit is a free application that allows you to read news feeds (both RSS and Atom feeds) and download podcasts from your desktop. It also can synchronize with your feeds in Google Reader and the Facebook news feed.
    Downloads: 21 This Week
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  • 16
    FCKeditor

    FCKeditor

    FCKeditor (retired)

    FCKeditor is the previous version of CKEditor and has been discontinued after version 2. The new CKEditor is redesigned from the ground up, offering more WYSIWYG text editing features, enhanced security and better integration. Don’t force yourself with retro FCKeditor. Switch to the new, cool CKEditor at ckeditor.com
    Downloads: 17 This Week
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  • 17
    MediaPortal

    MediaPortal

    Turn your PC into a very advanced MediaCenter/HTPC

    MediaPortal turns your PC into a very advanced MediaCenter / HTPC. It allows you to listen to your favorite music & radio, watch and store your videos and DVDs, view, schedule and record live TV as a digital video recorder and much much more
    Downloads: 15 This Week
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  • 18
    Little Registry Cleaner
    Little Registry Cleaner is an open source program designed for Microsoft's Windows Registry. Its purpose is to remove obsolete or unwanted items that build up in the registry over time in order to improve the stability & performance of your computer
    Downloads: 10 This Week
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  • 19
    eLibrary
    Books and eBooks library organizer. Catalog, tag and search your books database with ease. Automatically fetches the book's details and cover image from the web with a smart ISBN guesser.
    Downloads: 4 This Week
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  • 20
    Notepad X
    Notepad X is an alternative open source text editor for Microsoft Windows, with a lot of customization options created to help users managing text documents featuring tab navigation.
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    Downloads: 6 This Week
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  • 21
    Gnome Subtitles
    Gnome Subtitles is a subtitle editor for the GNOME desktop. It supports the most common text-based subtitle formats, video previewing, timings synchronization and subtitle translation.
    Downloads: 12 This Week
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  • 22
    All my USB Contents - Storage Catalog

    All my USB Contents - Storage Catalog

    All my USB Contents is a media cataloging tool to index media contents

    All my USB Contents - Storage Catalog is a media cataloging tool to index media contents This utility acts as a helpful librarian to help you keep track of documents, music, videos, and program files. Storage Catalog essentially downloads materials from either a CD or drive into an independent database that you can then organize any way you choose. This is a powerful and quick program that should be handy for both experienced home users and system administrators. The operation at the base of the program is simple: a device (USB / CD / folder) is scanned, the tree is reconstructed recursively with all the folders and files and all informations are stored in a SQlite DB. Now you can unplug the device and assign a category or a comment to each file or folder. You can perform searches by entering the song title, artist, filename and the program tells you on which device the file is. Moreover categorizing the various files and folders you can put everything according to logical group
    Downloads: 6 This Week
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  • 23
    Resx Editor is a small translation-oriented file editor for Microsoft RESX 2.0 files. Resx Editor is designed for professional translators (include a word count feature).
    Downloads: 3 This Week
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  • 24
    SipLine

    SipLine

    Free, native Windows SIP softphone with HD audio, SRTP encryption

    SipLine is a modern, lightweight SIP softphone for Windows 10/11 built with .NET 9 WPF. It provides enterprise-grade VoIP communication with a focus on performance, security, and extensibility. Features Ultra-Fast: Startup in <0.5s, minimal CPU usage HD Audio: Opus and G.711 codecs with adaptive jitter buffer Security: TLS transport, SDES-SRTP encryption, Windows DPAPI credential protection Multi-Account: Up to 5 simultaneous SIP accounts Plugin SDK: C# SDK for custom integrations (CRM, call recording, automation) Plugin Marketplace: Community and premium extensions Headset Support: Jabra, Poly, Sennheiser, Logitech with HID controls Call Quality: Real-time MOS Score, Jitter, Packet Loss and RTT monitoring Enterprise: Silent MSI installer, GPO support, JSON centralized config Compatibility: 3CX, Asterisk, FreePBX, OVH, Twilio, RingCentral, and more Language packages : https://sipline.feelautom.fr/languages
    Downloads: 9 This Week
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  • 25
    BLAZAM

    BLAZAM

    AD Web Management Platform

    Blazam is a web app that lets you manage Active Directory, even from your phone. You can delegate account functions and let your users manage Active Directory objects. Blazam also has user templates, photo management, and recycle bin access. For most up to date info, see https://blazam.org
    Downloads: 4 This Week
    Last Update:
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