Open Source C# Integrated Development Environments (IDE)

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.

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.

Microsoft’s vscode source code is open source (MIT-licensed), but the product available for download (Visual Studio Code) is licensed under this not-FLOSS license and contains telemetry/tracking. The VSCodium project exists so that you don’t have to download+build from source. This project includes special build scripts that clone Microsoft’s vscode repo, run the build commands, and upload the resulting binaries for you to GitHub releases. These binaries are licensed under the MIT license. Telemetry is disabled. If you want to build from source yourself, head over to Microsoft’s vscode repo and follow their instructions. VSCodium exists to make it easier to get the latest version of MIT-licensed VSCode. Please note that some Visual Studio Code extensions have licenses that restrict their use to the official Visual Studio Code builds and therefore do not work with VSCodium.

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.

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.

LuaEdit is an IDE/Text Editor/Debugger for the Lua language. Its interface looks like MS Visual Studio .Net� and includes syntax highlighting, code completion, advance breakpoint management, efficient search engines, etc. Client under GPL and server (core debugger) under LGPL.

A lightweight WPF framework for creating modular desktop applications with MVVM architecture, offering a customizable editing environment.

Python.NET (pythonnet) is a package that gives Python programmers nearly seamless integration with the .NET 4.0+ Common Language Runtime (CLR) on Windows and Mono runtime on Linux and OSX. Python.NET provides a powerful application scripting tool for .NET developers. Using this package you can script .NET applications or build entire applications in Python, using .NET services and components written in any language that targets the CLR (C#, VB.NET, F#, C++/CLI). Note that this package does not implement Python as a first-class CLR language - it does not produce managed code (IL) from Python code. Rather, it is an integration of the CPython engine with the .NET or Mono runtime. This approach allows you to use CLR services and continue to use existing Python code and C-API extensions while maintaining native execution speeds for Python code. If you are interested in a pure managed-code implementation of the Python language, you should check out the IronPython project.

Alphons van der Heijden, author of LSLEditor, the great off-line editor and debugging tool for scripting in Second Life, has donated his opus magnum to the free and open source community where it can grow and keep pace with the SL platform!

xacc.ide is a opensource IDE aimed at mainly .NET development. It has a code editor written in 100% C# code, which is faster than most commercial offerings.

To create the ultimate editor LaTeX and its variants specifically targeting writting and science. Assist the user with table editor, speed-writing etc..

A query language for code browsing. You query your database-- why don't you query your code? Write queries to provide custom views of your Java or C#/CLR code base. Integrates with popular IDEs or standalone.

RegexLab .NET is a rich-featured development environment and laboratory tool for creating, writing and editing complex regular expressions . It targets the .NET Framework and .NET Core (.NET 6, .NET 8) Regex Engine. Compared to other regex tools and lots of online regex testers this allows to store your regular expressions in local files including sample inputs for testing it. Use this tool build your own regex library with usage demonstration and meta data. This tool requires basic knowledge about regular expression. It is not a configurator that creates new regular expressions for you. This application can also be used for validating, matching, extracting/parsing and replacing texts. Or use it to extract data based on a regex. The execution results ca be exported to a structured file (e.g. CSV) as well.

A development integration and project building tool for HL2 modders. Build outdated files with the press of a button, eliminating the need for building with batch files. Create script files by visual representation, instead of typing them manually.

Alternate server and development environment for the Nabaztag device. Serveur et environnement de developement alternatifs pour le Nabaztag.

ANNOUNCEMENT: DEVELOPMENT PERMANENTLY MOVED TO CODEPLEX ( http://vpbide.codeplex.com/ )! Visual PureBasic IDE is a powerful development environment for PureBasic – especially for Windows applications with forms. It combines the power of PureBasic w

ScintillaNET - a .NET enabled version of the Scintilla Editor Component (see http://Scintilla.org) This project is now hosted at CodePlex (http://www.codeplex.com/Wiki/View.aspx?ProjectName=ScintillaNET) or (http://www.scide.net)

Hotaru is an XNA-based Game Engine that is intended to be used for 2D Action RPGs. Game Developers can use Tonbo (a Visual Studio Plug-in) to create and distribute games that run on Hotaru.

A tool to write Robot Arena robot codes.

Features of MS Script control (Functions like AddObject) and some features of VSA/Visual Studio editor .Mini visual studio IDE build in single control with feature like AddObject from MS Script Control.

<HTML> Editor is a free open source HTML editor from Sheva Software Inc the HTML Editor includes syntax highlighting and a unique feature of a live previewing of current HTML document, check it out, and please wright a review if possible.

The ASL Notepad is a IDE for ACPI SourceLanguage with many Features like Syntax highlighting, Debugger, Compiler and so on. Currently available language is only German but we plan to integrate more lanuages in the next release.

A simple free Actionscript and flex code editor for Linux built with Mono and Gtk# The title is a working title so any name suggestion will be accepted gratefully.

Macromedia ActionScript version 2 documentation generator. To begin with, an application which reads AS2 package directories (and their content) and allows you to view Javadoc style documentation, class heirarchies and package heirarchies. Later stages

Paranoia Text Encryption mantiene SMS, correos, mensajes de redes sociales, notas y cualquier otro texto a salvo de ladrones, hackers y fisgones. Basta con pegar texto copiado desde cualquier aplicación, o guardarlo en un archivo para usarlo más adelante. Paranoia Text Encryption keeps SMS, mails, messages from social networks, notes and any other text safe from thieves, hackers and snoopers. Simply paste text copied from any application, or save it in a file, use it more later