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.

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.

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.

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!

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

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.

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.

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.

<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.

Personal information management application. Powerful and simple. Free and opensoure. Inspired by todos.txt and markdown.

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.

dotView Visual Studio is an open source IDE for dotView PHP framework. Main Functions : syntax highlight, break point and debug, integrating WAMP environement, and RAD tools. Support : PHP5, JS, CSS, HTML, XML, DOJO, JQUERY, SVN, FTP

SmartIDE is a very simple, yet extremely powerful IDE. It is not language specific which is the root of all its power. It can be adopted to work with many different languages and their specific environments.

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.

NESide is an IDE specially made for coding in assembly language for the NES. Featuring syntax-coloring and integrated editors for palette and name tables. Also includes a plug-in system for extensibility.

GUIE (GUI Editor) provides a simple WYSIWYG GUI editor for many dynamic languages. Currently FarPy supports wxPython, wxRuby, wxPerl & IronPython!

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

The Project includes the TLA Language Package that defines the TLA+ language for VS 2005 IDE and the TLA Integration Package that adds menus in the VS 2005 IDE and assigns different functionalities to them.

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)

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.

Locos is an object oriented framework for building parsers and other language processing tools.

This is a Vi emulator for Visual Studio .NET 2005.

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

A little editor to create kOS Scripts in better environment than in-game.