I have found this very useful Chrome extension called Postman. This is a very useful extension especially when you are into programming RESTful applications.
One thi
Chrome packaged apps can have cross domain permissions. When you install Postman it promts you that this app will access any domain.
By placing */* in permissions section of your manifest file, you can do this.
*/*
permissions
Read more here: https://developer.chrome.com/extensions/xhr.html