Jsonium is a free REST client for JSON over HTTP protocols
Jsonium allows testing of your REST API in an easy and convenient way. It provides formatting and syntax highlighting for request and response content, and ability to store and reuse requests. Jsonium is distributed under free license.
Easy to edit request with JSON syntax highlighting
Pretty formatting of JSON and XML responses
Requests can be stored and reused
The same request can be used in different contexts with variables.