I'd recommend Postman for this.

• It supports all HTTP verbs, not just GET, POST, PUT and DELETE.
• It has a UI.
• While it does offer additional functionality like collaboration, I'm using it myself just for basic functionality like grouping and saving requests.
• It's free and runs on Windows and a couple of other OSes.

I'd recommend Postman for this.

• It supports all HTTP verbs, not just GET, POST, PUT and DELETE. Some operations might require HTTP headers to be set (e.g. for authentication) and it supports that too.
• You can supply a raw body for your request, or key-value pairs which Postman can transform into e.g. URL encoded form content.
• It has a UI.
• While it does offer additional functionality like collaboration, I'm using it myself just for basic functionality like grouping and saving requests.
• It's free and runs on Windows and a couple of other OSes.