CRUD through HTTP is a good step forward to using resources and becoming RESTful. Another step further into it is to make use of hypermedia-based services and the Restfulie gem allows you to do it very quickly.
Marley is a framework for quickly building RESTful Web services and applications with Ruby. Development is fast because Marley implements lots of sensible defaults, all of which can be overridden.
An HTTP Web services client for the Mac.
An IDE for Python.