When I'm on the plane, I usually read (on paper or Kindle). The last time was a couple of weeks ago and I was reading the excellent REST in Practise book.
On the first page, Advance Praise for REST in Practice I read this:
Here is the description from the Caelum Objects website:
A restful framework based on the four constraints defined by Roy Fielding. It uses HATEOAS within its core in order to be able to create loosely coupled distributed systems.
I am looking forward trying Restfulie! For those interested, I found the .NET version of the server here and the client implementation here.