Eclipse HTTP Client (http4E) is an add-on for Eclipse that allows you to make HTTP and REST requests. It simplifies the testing and development of web services. Very useful for falsifying headers.
Features:
Making HTTP requests directly from the Eclipse IDE
Parameters for http packet body
Tab Support
Story
Code generation
Great usability and interface
Syntax highlighting and “code assist”
Various presentation options: “Raw”, “Pretty”, “Hex”, “Browser” and “JSON”