The core source code of Microsoft's free code editor, supporting editing, debugging, and extensions for multiple programming languages, one of the most popular tools for developers.

A Microsoft open-source Python tool that quickly converts common files like PDF, Word, and Excel to Markdown, specifically designed for AI model consumption.

Microsoft's AI agent collaboration framework enabling multiple AI roles to work as a team, but now in maintenance mode; new users should check the successor.

Microsoft's open-source voice AI toolkit that converts long audio to text and text to natural speech, supporting multiple languages.

A cross-platform framework by Microsoft that lets you write code once in C# and deploy to both mobile and desktop devices.

Source code for Microsoft's .NET runtime, enabling developers to build software in C# across various devices, acting as an engine behind many apps.