Visual Studio is a fully extensible development platform and empowers you to extend almost every part:

• Add menu items and toolbars items that activate functionality you build
• Create tool windows that offer entirely new functionality
• Integrate new languages into the IDE
• Offer light bulbs that help developers write better code
• Integrate new project types into Visual Studio

Find more information on the Visual Studio website!

Get started with building extensions for Visual Studio:

1. Detailed getting started documentation on Microsoft Docs
2. Extension samples on GitHub
3. Chat with other extension developers on Gitter
4. Channel 9 Videos on extensibility
5. Extensibility Tools to make it easier to build extensions

See a list of Community Extensions.