HTTPie

HTTPie is an HTTP request/response tool written in Python.  You can easily use the various HTTP methods such as GET, POST, PUT and DELETE and check the responses.  The tool formats and colorizes HTTP responses to make them easier to understand.

https://github.com/jkbr/httpie

A blog posting on how to use HTTPie with Windows can be found at http://www.hanselman.com/blog/InstallingHTTPIEHTTPForHumansOnWindowsGreatForASPNETWebAPIAndRESTfulJSONServices.aspx.