Few Useful Links About How to Test Responsive UI

11 tools for responsive UI.

1. http://www.browserstack.com/responsive

   Best tool! Lots of variety testing enviroment.Altought have to paid, but it's worth.

2. http://www.studiopress.com/responsive/
3. http://responsivetest.net/
4. http://responsivedesignchecker.com/getbootstrap.com/
5. http://lab.maltewassermann.com/viewport-resizer/
6. http://quirktools.com/screenfly/
7. 10 Helpful Resources for Testing Responsive Web Design
8. http://responsive.is/
9. Chrome Extension: Responsive Web Design Tester
10. 50 Useful Responsive Web Design Tools For Designers
11. Responsive Resources