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Accessibility Insights

Accessibility Insights is a suite of open source tools that help developers find and fix accessibility issues in Web, Windows and Android applications.

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Azure SDKs

The Azure SDKs are a set of libraries focused on ensuring that developers around the world have a first-class experience leveraging Azure services in their applications.

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Blazor lets you build interactive web UIs using C# instead of JavaScript

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Bond is an open-source, cross-platform framework for working with schematized data.

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CCF is a framework for building secure, highly available, performant blockchain and multi-party applications.

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CNAB is a spec for packaging distributed apps

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Dapr logo


An event-driven, portable runtime for building microservices on cloud and edge

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Decentralized & Collaborative AI on Blockchain

Decentralized & Collaborative AI on Blockchain is a framework to host and train publicly available machine learning models. Ideally, using a running inference using a model stored in a smart contract is free.

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.NET is Microsoft's open-source, general-purpose development framework for building cross-platform apps.

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A collection of technologies built on Web Components and modern Web Standards, designed to help you efficiently tackle some of the most common challenges in website and application design and development

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Language Server Protocol

Defines the protocol used between an editor or IDE and a language server to provide useful features

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ONNX Runtime

ONNX Runtime is a cross-platform inferencing and training accelerator compatible with many popular ML/DNN frameworks, including PyTorch, TensorFlow/Keras, scikit-learn, and more

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Open Enclave SDK

Open Enclave is an open source C SDK for creating a single unified enclave abstraction to build Trusted Execution Environment (TEEs) based applications.

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Open Service Mesh

Open Service Mesh (OSM) is a lightweight and extensible cloud native service mesh

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pg_auto_failover is an extension and service for PostgreSQL that monitors and manages automated failover for a Postgres cluster

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Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API.

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PowerShell is a cross-platform task automation and configuration management framework, consisting of a command-line shell and scripting language.

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Microsoft PowerToys is a set of utilities for power users to tune and streamline their Windows experience for greater productivity.

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PWABuilder logo


Helping developers build Progressive Web Apps (PWAs) and package them for app stores like Google Play, Microsoft Store, MacOS Store, and more.

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SONiC is an open source network operating system based on Linux that runs on switches from multiple vendors and ASICs

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Windows Terminal

The new Windows Terminal and the original Windows console host, all in the same place!

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TypeScript is an open-source and cross-platform language that builds on JavaScript by adding static types and type-checking

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VFS for Git

The Virtual Filesystem for Git (formerly GVFS) is an open source system that enables Git to operate at enterprise-scale

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Virtual Kubelet

Virtual Kubelet is an open source Kubernetes kubelet implementation

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Visual Studio Code

Visual Studio Code is a free, highly customizable code editor that is based on an open-source codebase and runs on Linux, macOS, and Windows.

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YARN Federation

YARN Federation allows to operate several YARN clusters and tie them together transparently

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Explore Microsoft projects

Microsoft engineers and community members maintain thousands of GitHub repos: everything from complete samples, to product SDKs, to entire products.

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