Responsive design testing tool – Viewport Resizer
A handy little bookmarklet for quickly checking how a site might look at different screen sizes, and you can customise it to use whichever screen sizes you like.
IE10 Snap Mode and Responsive Design - TimKadlec.com
Useful advice from Tim on preparing your responsive site for IE10’s new “snap mode”. Don’t worry: it doesn’t involve adding any proprietary crap …quite the opposite, in fact.
A handy little tool for testing responsive designs by automatically changing your browser viewport size.