Browse free open source C# Software Development Software and projects below. Use the toggles on the left to filter open source C# Software Development Software by OS, license, language, programming language, and project status.
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View and manage processes, services and more with this powerful tool.
Process Hacker is a free and open source process viewer. This multi-purpose tool will assist you with debugging, malware detection and system monitoring.
TurboCPP is a repository that presents a version of the classic Turbo C++ IDE made compatible with modern Windows editions (Windows 8, 10, 11). Essentially, it revives a legacy development environment that many students or enthusiasts still prefer for simplicity or nostalgia, packaged for current systems. The repository includes installer or distribution artifacts, compatibility wrappers, and sometimes tweaks to make it work under modern OS constraints. It allows users to run and compile old Turbo C++ programs without needing legacy virtual machines or DOS emulators. While it does not match modern compilers in standards compliance, optimization, or language features, its attraction lies in compatibility with educational or legacy codebases. The project targets hobbyists or learners who want to revisit old C++ assignments or retro programming without abandoning newer system environments.
Paessler: Easy to Use With Enterprise Power. Free Trial
A low-code dashboard makes monitoring intuitive for any admin, while scripting and custom sensors give experts full control.
You shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
dnSpy is a free and open-source tool tailored for debugging, decompiling, and editing .NET and Unity assemblies—even without source code. It supports light/dark themes and portable use, making it popular among developers and reverse engineers.
AssetStudio is a tool for exploring, extracting and exporting assets
AssetStudio is a cross-platform tool for exploring, extracting, and exporting assets from Unity games—supporting assetbundles and built-in assets. It handles textures, sprites, audio, meshes, shaders, and more, exporting to formats like png, bmp, mp3, wav. The original is archived (supports Unity ≤2022.1); forks like AssetStudio2024 add support for newer Unity versions and Lua asset decompiling.
Technical analysis library with indicators like ADX, MACD, RSI, Stochastic and TRIX, plus candlestick pattern recognition. Docs: https://ta-lib.org
Available natively in C/C++, Java, Rust and C# with wrappers for python, R and many other ecosystems.
MOVED TO GITHUB: https://github.com/TA-Lib/ta-lib . No further support is provided on SourceForge.
Release 0.4.0 is very outdated, please check github for the most recent release.
Unity / XNA game patcher and plugin framework. BepInEx is a plugin / modding framework for Unity Mono, IL2CPP, and .NET framework games (XNA, FNA, MonoGame, etc.) Stable builds are released once a new iteration of BepInEx is considered feature-complete. They have the least bugs, but some newest features might not be available. Bleeding edge builds are available on BepisBuilds. Bleeding edge builds are always the latest builds of the source code. Thus they are the opposite to stable builds: they have the newest features and bugfixes available, but usually tend to be the most buggy. Therefore you should use bleeding edge builds only if you are asked to or if you want to preview the upcoming version of BepInEx. Some games require some additional changes in order to work around specific limitations of different Unity versions.
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata
ILSpy is the open-source .NET assembly browser and decompiler. Visual Studio 2022 ships with decompilation support for F12 enabled by default (using our engine v7.1). In Visual Studio 2019, you have to manually enable F12 support. Go to Tools / Options / Text Editor / C# / Advanced and check Enable navigation to decompiled source. C# for Visual Studio Code ships with decompilation support as well. To enable, activate the setting "Enable Decompilation Support. ILSpy is distributed under the MIT License. Please see the About doc for details, as well as third-party notices for included open-source libraries. Visual Studio 16.3 and later include a version of the .NET (Core) SDK that is managed by the Visual Studio installer - once you update, it may get upgraded too. Please note that ILSpy is only compatible with the .NET 6.0 SDK and Visual Studio will refuse to load some projects in the solution.
Command-line shell and scripting language built on .NET
Powershell is a cross-platform, task-based command-line shell and scripting language that helps rapidly automate tasks that manage operating systems (Linux, macOS and Windows) and processes. It works well with existing tools and is optimized for dealing with structured data, REST APIs and object models. PowerShell was developed by Microsoft as a task management and configuration management framework.
Powershell is designed to let you manage computers from the command line and improve the command-line and scripting environment.
A mod to make and play Terraria mods. Supports Terraria 1.4
tModLoader (TML) is an open-source, community-driven, modification and expansion of the Terraria game that makes it possible to make and play mods. TML expands your Terraria adventures with new content to explore created by the Terraria community! TML allows players to create and play Terraria mods and is designed in such a way so that you can play alone or together with friends, with one mod or with multiple mods, choose to play however you like! It is however required that all your friends also install TML if you want to play together; vanilla users can't play with TML users. First and foremost, TML is largely a community endeavor, built by the community; used by the community. Without all the contributions people in the community have made over the years, TML would not be in the state it is in. TML is a free-to-use modification of the game and will stay that way.
A rewrite of the old legacy software "depends.exe" in C# for Windows
Dependencies is a rewrite of the legacy software Dependency Walker which was shipped along Windows SDKs, but whose development stopped around 2006. Dependencies can help Windows developers troubleshooting their dll load dependencies issues. Dependencies is currently shipped as two binaries (no installer present) : Dependencies.exe as a CLI tool and DependenciesGui.exe for its GUI counterpart (see screenshot). Just click on one of the release numbers above (preferably the latest), download and uncompress the archive and run DependenciesGui.exe. Since the binary is not signed, SmartScreen might scream at runtime. Dependencies also bundle ClrPhTester.exe, a dumpbin-like executable used to test for non-regressions. Dependencies currently does not recursively resolve child imports when parsing a new PE since it can be really memory-hungry to do so ( it can over a GB even for "simple" PEs ).
Il2CppDumper is a Unity IL2CPP reverse engineering tool for analyzing supported Unity applications and game binaries. It can restore DLL metadata structures without restoring original code, which helps researchers inspect classes, methods, fields, MonoBehaviour data, and MonoScript information. The tool supports executable formats such as ELF, ELF64, Mach-O, PE, NSO, and WASM. It supports Unity versions from 5.3 through 2022.2, according to the repository documentation. Il2CppDumper can generate helper scripts for IDA, Ghidra, and Binary Ninja, along with structure headers and JSON outputs. It is best suited for authorized reverse engineering, interoperability research, security analysis, modding research, and educational binary analysis.
Turbo C++ is a repackage/installer/build of the old Turbo C++ IDE/compiler adapted for modern Windows versions (Windows 8 / 8.1 / 10 / 11). It offers a way to run or install Turbo C++ (the classic Borland IDE) on newer Windows builds, so one can use it for C/C++ development or educational purposes where that old environment is desired.
Locale Emulator is a tool similar to AppLocale and NTLEA, providing a simulation function that can make an application recognize your OS as in a language other than the real one. It is quite useful when you are trying to play country-specific games. Locale Emulator is compatible with the following systems, both 32 and 64-bit, Windows 7 with Service Pack 1, Windows 8.1, and Windows 10. Locale Emulator supports 32-bit executables running on both 32-bit or 64-bit systems. For example, if you are using 64-bit WinRAR, you will not see the context menu on a RAR file unless you swapped 64-bit WinRAR with the 32-bit version. Clone the repo using Git, install Microsoft Visual Studio 2015 / 2017, open LocaleEmulator.sln, perform build action, clone and build the core libraries, and copy LoaderDll.dll and LocaleEmulator.dll from Locale-Emulator-Core to Locale-Emulator build folder.
Secure, cross-platform Git credential storage with authentication
Git Credential Manager (GCM) is a secure Git credential helper built on .NET that runs on Windows, macOS, and Linux. It aims to provide a consistent and secure authentication experience, including multi-factor auth, to every major source control hosting service and platform. GCM supports (in alphabetical order) Azure DevOps, Azure DevOps Server (formerly Team Foundation Server), Bitbucket, GitHub, and GitLab. Compare to Git's built-in credential helpers (Windows: wincred, macOS: osxkeychain, Linux: gnome-keyring/libsecret), which provide single-factor authentication support for username/password only. GCM replaces both the .NET Framework-based Git Credential Manager for Windows and the Java-based Git Credential Manager for Mac and Linux. Git Credential Manager is currently available for Windows, macOS, and Linux*. GCM only works with HTTP(S) remotes; you can still use Git with SSH.
.NET C# USB library for WinUSB, LibUsb-Win32, and libusb-1.0. Using the common device classes, applications work with all operating systems and drivers without modification. Lots of example code. Open source software at sourceforge.net.
32/64 bit multi-platform Ethernet S7 PLC communication suite
Snap7, through three specialized components: Client and the inedited Server and Partner, allows you to definitively integrate your PC based systems into a PLC automation chain.
Designed to transfer large amounts of hi-speed data in industrial facilities, it scales easily, down to small Linux Arm boards such as Raspberry PI.
Hi level object oriented wrappers are provided, currently C/C++, .NET/Mono, Pascal, LabVIEW, Python with many source code examples.
Very easy to use, a full working server example is not bigger than the “Hello world”.
Many projects/makefiles are ready to run to easily rebuild Snap7 in any platform without the need of be a C++ guru.
Very detailed documentation provided.
Low Orbit Ion Cannon.
The project only keeps and maintains (bug fixing) the code written by the original author - Praetox, but is not associated or related to it.
DISCLAIMER: USE ON YOUR OWN RISK. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER OR CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES.
Windows tool to manage and customize right-click context menus
ContextMenuManager is a Windows utility for enabling, disabling, renaming, icon-editing, deleting, and adding entries to the file/folder, New, Send To, Open With, IE, and Win+X context menus. It features a friendly UI, registry navigation, and multi-language support. Ideal for users seeking granular control over system context options on Windows 7 through 11.
mRemoteNG is the next generation of mRemote, open source
mRemoteNG ("Multi‑Remote Next Generation") is a free, open‑source, tabbed remote connection manager for Windows. It consolidates multiple remote protocols (e.g., RDP, VNC, SSH) into a single interface, making it easier to organize and manage connections. Tabbed interface for keeping multiple sessions organized. Integrates with external credential vaults (e.g. Thycotic Secret Server) and supports dynamic host update for EC2. Supports a wide range of protocols: RDP, VNC, SSH, Telnet, HTTP/HTTPS, raw socket, PowerShell remoting.
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.
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
Open source, cross-platform, user-mode tablet driver
OpenTabletDriver is an open-source, cross-platform, user mode tablet driver. The goal of OpenTabletDriver is to be cross-platform as possible with the highest compatibility in an easily configurable graphical user interface. OpenTabletDriver functions as two separate processes that interact with each other seamlessly. The active program that does all of the tablet data handling is OpenTabletDriver.Daemon. The daemon must be started in order for anything to work, however, the GUI is unnecessary. If you have existing settings, they should apply when the daemon starts. The requirements to build OpenTabletDriver are consistent across all platforms. Running OpenTabletDriver on each platform requires different dependencies. Run build.ps1 to produce binary builds to 'bin' folder. These builds will run in portable mode by default.
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