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Re:Postman – Now available for Windows by tomcam on Friday August 19, 2016 @03:06AM (#12318398)
Spelunked the site for a while, but couldn't figure out what it does. Could not find an About page, for example.
Re:Postman – Now available for Windows by et-al on Friday August 19, 2016 @03:44AM (#12318520)
Sends http requests. A curl limited to http with a nice GUI.

(You have a valid critique about the site. Their meta description is actually much more informative: Postman is the swiss army knife of API tools, allowing you to design, build, test, document and monitor your services, all in one place. Postman is available for Chrome, Mac OSX and Windows. A Linux app is coming soon!)