Visual Studio GitHub Repositories (2026) · Open Source Tools

A visual studio extension which enhances syntax highlighting, quick info (tooltip), navigation bar, scrollbar, display quality, and brings smart tool bar with code refactoring to code editor.

NUnit 3.0 Visual Studio test adapter for use under VS 2012 or later

Unofficial Tailwind CSS extension for IntelliSense, linting, sorting, and more to enhance the development experience in Visual Studio 2026 and 2022.

A Blazor Web App and Minimal API for performing RAG (Retrieval Augmented Generation) and vector search using the native VECTOR type in Azure SQL Database and Azure OpenAI.

A OneNote add-in with simple, yet powerful and useful features

Visual Studio extension to show the code structure of your current document

This repository holds the source code of Microsoft.Testing.Platform (MTP), a lightweight alternative to VSTest, as well as MSTest adapter and framework.

SAKURA Editor (Japanese text editor for MS Windows)

Core functionality needed to create .NET Core projects, that is shared between Visual Studio and CLI

The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.