RestfulBeans is a high level API for sharing objects between a server and a Java-based client. The underlying protocol is designed to expose the data consumed by a rich client to the search engines. The key properties of the protocol are compliance with the HTTP spec and REST principles, and XML representation for Java Beans with object references represented as XLink (to allow search engines to walk through the object tree). The key API property is the ability to work with remote objects as if they were local. An application using RestfulBeans is automatically capable of supplying users with URLs for any “content item” it deals with.
Hydro is an independent implementation of ICE, the object-oriented RPC protocol by ZeroC, for the O'Caml programming language. Hydro (like ICE) allows you to bridge language barriers by letting components written in different programming languages communicate with each other. ZeroC's ICE product currently includes implementations for C++, Java, C#, Python, Ruby, VB, and PHP. Hydro adds support for O'Caml. Hydro includes an asynchronous runtime and a generator called hydrogen.