Free software programmed in C Sharp

software application

KeePass Password Safe is a free and open-source password manager primarily for Windows. It officially supports macOS and Linux operating systems through the use of Mono. Additionally, there are several unofficial ports for Windows Phone, Android, iOS, and BlackBerry devices, which normally work with the same copied or shared (remote) password database. KeePass stores usernames, passwords, and other fields, including free-form notes and file attachments, in an encrypted file. This file can be protected by any combination of a master password, a key file, and the current Windows account details.

Bitwarden is a freemium open-source password management service that is used to store sensitive information, such as website credentials, in an encrypted vault. It is owned and developed by Bitwarden, Inc.

runtime and set of APIs in the .NET Framework for building connected, service-oriented applications

IronPython is an implementation of the Python programming language targeting the .NET and Mono frameworks. The project is currently maintained by a group of volunteers at GitHub. It is free and open-source software, and can be implemented with Python Tools for Visual Studio, which is a free and open-source extension for Microsoft's Visual Studio IDE.

open source network stress testing and denial-of-service attack application

notetaking application

F-Spot is a discontinued image organizer, that was designed to provide personal photo management for the GNOME desktop environment. The name is a play on the word F-Stop. F-Spot can be used for basic photo editing and management.

MonoDevelop (also known as Xamarin Studio) is a discontinued open-source integrated development environment for Linux, macOS, and Windows. Its primary focus is development of projects that use Mono and .NET Framework. MonoDevelop integrates features similar to those of NetBeans and Microsoft Visual Studio, such as automatic code completion, source control, a graphical user interface (GUI), and Web designer. MonoDevelop integrates a Gtk# GUI designer called Stetic. It supports Boo, C, C++, C#, CIL, D, F#, Java, Oxygene, Vala, JavaScript, TypeScript, and Visual Basic.NET. Although there is no wo

HandBrake is a free and open-source transcoder for digital video files. It was originally developed in 2003 by Eric Petit to make ripping DVDs to a data storage device easier. HandBrake's backend contains comparatively little original code; the program is an integration of many third-party audio and video libraries, both codecs (such as FFmpeg, x264, and x265) and other components such as video deinterlacers (referred to as "filters"). These are collected in such a manner to make their use more effective and accessible (e.g., so that a user does not have to transcode a video's audio and visual

SharpDevelop (also styled as #develop) is a discontinued free and open source integrated development environment (IDE) for the .NET Framework, Mono, Gtk# and Glade# platforms. It supports development in C#, Visual Basic .NET, Boo, F#, IronPython and IronRuby programming languages.

web application framework

Umbraco is an open-source content management system (CMS) platform for publishing content on the World Wide Web and intranets. It is written in C# and deployed on Microsoft based infrastructure. Since version 4.5, the whole system has been available under an MIT License.

set of freeware system utilities developed by Microsoft

open-source Microsoft Silverlight implementation

image editing software

IronRuby is an implementation of the Ruby programming language targeting Microsoft .NET Framework. It is implemented on top of the Dynamic Language Runtime (DLR), a library running on top of the Common Language Infrastructure that provides dynamic typing and dynamic method dispatch, among other things, for dynamic languages.

CrypTool is an open-source project that is a free e-learning software for illustrating cryptographic and cryptanalytic concepts.

Cyberduck is an open-source client for FTP and SFTP, WebDAV, and cloud storage (OpenStack Swift, Amazon S3, Backblaze B2 and Microsoft Azure), available for macOS and Windows (as of version 4.0) licensed under the GPL. Cyberduck is written in Java and C# using the Cocoa user interface framework on macOS and Windows Forms on Windows. It supports FTP/TLS (FTP secured over SSL/TLS), using AUTH TLS as well as directory synchronization. The user interacts with the user interface (GUI), including file transfer by drag and drop and notifications via Growl. It is also able to open some files in extern

Jellyfin is a free and open-source media server and suite of multimedia applications designed to organize, manage, and share digital media files to networked devices. Jellyfin consists of a server application installed on a machine running Linux, Microsoft Windows, or macOS; and another application running on a client device such as a smartphone, tablet, smart TV, streaming media player, game console or in a web browser. Jellyfin also can serve media to DLNA and Chromecast-enabled devices. It is a fork of Emby.

ShareX is a free and open-source screenshot and screencast software for Windows. It is published under the GNU General Public License. The project's source code is hosted on GitHub. It is also available on the Microsoft Store and Steam.

Chocolatey is a machine-level, command-line package manager and installer for software on Microsoft Windows. It uses the NuGet packaging infrastructure and PowerShell to simplify the process of downloading and installing software.

db4o (database for objects) was an embeddable open-source object database for Java and .NET developers. It was developed, commercially licensed and supported by Actian. In October 2014, Actian declined to continue to actively pursue and promote the commercial db4o product offering for new customers.

application launcher for Linux

StealthNet is an anonymous P2P file sharing software based on the original RShare client, and has been enhanced. It was first named 'RShare CE' (RShare Community Edition). It use the same network and protocols as RShare.

MonoGame is a free and open source C# framework used by game developers to make games for multiple platforms and other systems. It is also used to make Windows and Windows Phone games run on other systems. It supports iOS, iPadOS, Android, macOS, Linux, PlayStation 4, PlayStation 5, PlayStation Vita, Xbox One, Xbox Series X/S and Nintendo Switch. It implements the Microsoft XNA 4 application programming interface (API). It has been used in several notable games, including Bastion, Celeste, Barotrauma, Fez, and Stardew Valley.

NHibernate is a port of the Hibernate object–relational mapping (ORM) framework for the Microsoft .NET platform. It provides a framework for mapping an object-oriented domain model to a traditional relational database. It is used to map an object-oriented domain model to a relational database, aiming to reduce the amount of manual coding required for data persistence. NHibernate is free and open-source software, distributed under the GNU Lesser General Public License.

Windows Installer XML Toolset (WiX, pronounced "wicks") is a free software toolset that builds Windows Installer packages from XML. It consists of a command-line environment that developers may integrate into their build processes to build MSI and MSM packages. WiX was the first Microsoft project to be released under an open-source license, the Common Public License. It was also the first Microsoft project to be hosted on an external website.

hMailServer was a free email server for Windows created by Martin Knafve. It ran as a Windows service and includes administration tools for management and backup. It had support for IMAP, POP3, and SMTP email protocols. It could use external database engines such as MySQL, MS SQL or PostgreSQL, or an internal MS SQL Compact Edition engine to store configuration and index data. The actual email messages were stored on disk in a raw MIME format. As of January 15th, 2022, active support and development were officially halted, although version 5.6 will continue to receive updates for critical bugs

NUnit is an open-source unit testing framework for .NET, .NET Framework, and Mono. It serves the same purpose as JUnit does in the Java world, and is one of many in the xUnit family.

Greenshot is a free and open-source screenshot program for Microsoft Windows. It is developed by Thomas Braun, Jens Klingen and Robin Krom and is published under GNU General Public License, hosted by GitHub. Greenshot is also available for macOS, but as proprietary software through the App Store.

iFolder is an open-source application, developed by Novell, Inc., intended to allow cross-platform file sharing across computer networks.

Programming syntax for ASP.NET

S&box (pronounced Sandbox) is an upcoming open source video game development platform and engine by Facepunch Studios. It is built using a heavily modified Source 2 engine and will be released on April 28, 2026. S&box is intended to be a spiritual successor to ''Garry's Mod'' and is designed to allow users to create a variety of games and experiences.

Ryujinx is a discontinued free and open-source emulator of the Nintendo Switch. It was first released on February 5, 2018 and supported more than 3,000 games by 2024.

Duplicati is an open-source backup client that securely stores encrypted, incremental, compressed remote backups of local files on cloud storage services and remote file servers. Duplicati supports not only various online backup services like OneDrive, Amazon S3, Backblaze, Rackspace Cloud Files, Tahoe LAFS, and Google Drive, but also any servers that support SSH/SFTP, WebDAV, or FTP.

project aimed at preserving browser games and Flash animations

IL2CPU (IL To CPU) is an ahead-of-time (AOT) compiler for .NET that is written using one of its Common Intermediate Language compliant languages (C#). It translates Common Intermediate Language to bare metal machine code. IL2CPU is the primary compilation component of the Cosmos Project, and is developed by the same team.

open-source GIS desktop application

subtitle editing software