Something a bit different but I'm a huge fan of NSwag recently.

https://github.com/RicoSuter/NSwag

We use it on a project at work in C# and I've also been using it personally on pet projects with TypeScript.

Allows you to automatically generate REST API clients based on Swagger/OpenAPI specs and is very customizable.

Really nice if building out microservices and you're wanting to communicate between each other or building web apps and want to communicate with APIs. Saves a lot of time writing code to make requests and handle different status codes etc. Automatically generates all the classes/interfaces with sane naming schemes etc.

Even has a GUI application to generate the configs also if you wish.