The Viasfora extension adds many useful features for code (C#, C/C++, JS, VB, F#, SQL, TypeScript, Python, PowerShell, R, JSON, Fortran) as well as editing XML files. Change log.
Inspired by the Vim plugin of the same name, this feature makes it easy to keep track of nested braces.
Customize the appearance of control flow, visibility and LINQ keywords:
You can customize how XML namespace prefixes are rendered in the VS XML editor, as well as rendering XML closing element tags in a different color.
And many other features!
Viasfora implements basic telemetry using Azure Application Insights to identify which Visual Studio versions are being most commonly used and prioritize features. If you'd prefer to opt-out of the telemetry collection, you can disable it from the Tools -> Options -> Viasfora option dialog.