The Visual Studio extension ecosystem is a rich one, and it is where productivity tools like ReSharper have an opportunity to enhance the development experience of .NET developers everywhere. If you use any extension other than ReSharper, you're likely familiar with the Manage Extensions dialog.
ReSharper users will likely also have seen the ReSharper Extensions dialog, accessible under
Extensions \| ReSharper \| Extension Manager....
Let's talk about IDE plugins, as they are closest in concept to Visual Studio extensions. Rider's plugins are accessible via the Plugins section in Settings. Developers can find many of the ReSharper extensions in the JetBrains Marketplace. Since ReSharper is the engine that powers many of Rider's editor features, most of these plugins "just work".
A bonus for Rider users is we aren't limited to plugins that primarily target .NET development. Since Rider is part of the IntelliJ family of products, developers can benefit from plugins designed for IntelliJ IDEA, PyCharm, GoLand, RubyMine, WebStorm, and CLion. JetBrains ships many of the features in Rider as plugins deriving from other products.