Sharepoint - What is the best custom C# Library for REST API

(I must say it is embarrassing to admit this) I have (partially) done this with REST.

I had used Newtonsoft.Json to parse the responses and HttpWebRequests to interact with the REST API. (I think you would be able to work with Atom using System.Xml as well.)

However I am not aware of a single library doing the process end-to-end.