SerfJ provides a very easy way of developing Java REST Web applications. It helps you to develop your application over an elegant MVC architecture, giving more importance to convention than configuration. This means, for example, you will not need configuration files or annotations in order to specify which view serves a controller's method. However, SerfJ is very flexible, so if you want to jump over those conventions, you can configure the behavior of your applications as you like. The framework tries to meet the JSR 311 specification, but it doesn't follow every point of the specification, because the purpose is to have a very intuitive library, and some some aspects of the specification are out of the scope of SerfJ.
GridPort is a simple and robust open standard for portlets based on HTTP. It aims to be a simple, scalable distributed composition independent of implementation technology. Transparent collaboration and an SOA paradigm from both interface and data perspectives are encouraged. Component types include portal, proxy for asynchronous multi-casting, and portlets. The purpose of this project is to develop mainly the specification alongside a prototype to enable development of these components in any programming environment and operating platform, which is why its central protocol is HTTP 1.1.
Guzzle is a RESTful Web service client framework that enables PHP developers to quickly build testable Web service clients utilizing HTTP/1.1 best practices. It gives you access to advanced features like persistent HTTP connections, parallel requests, exponential backoff, over the wire logging, MD5 validation, cookie jars, and a caching forward proxy.