SweetSOA!

Postman helps you be more efficient while working with APIs. Postman is a scratch-your-own-itch project. The need for it arose while one of the developers was creating an API for his project. After looking around for a number of tools, nothing felt just right. The primary features added initially were a history of sent requests and collections. A number of other features have been added since then. Here is a small list.

The web developers helper program to create and test custom HTTP requests.Advanced REST client for Google Chrome.

A REST client for almost any web service (Firefox and Chrome extension).

APIs are essential to every online business. StopLight helps companies manage their API lifecycle. Our visual modeling solution removes the massive amount of manual effort needed today, and instead reduces friction, and improves efficiency, across all API stakeholders.

Hurl makes HTTP requests. Enter a URL, set some headers, view the response, then share it with others. Perfect for demoing and debugging APIs.

This is a free online tool for WSDL/SOAP testing.

REST Client for Android is a development tool used to test RESTful web services. Features include:

Crosscheck Networks designed SOAPSonar from the ground-up as a comprehensive testing solution with features that can be utilized throughout all phases of the service development lifecycle. SOAPSonar is easy to deploy and requires no knowledge of SOAP, XML, or WSDL to be effective. Services can be tested within minutes, and more complex testing scenarios can be built including complex security, identity, automation, and performance

A Simple Windows application to help developers debug REST based services.