Here’s the CSS and markup you need to make third-party iframes responsive. Handy!
A bookmarklet version of that handy multiple-iframe page I linked to the other day. Even more useful for testing responsive designs!
A handy little document to load pages into differently-sized iframes—useful for testing responsive designs.
I never expected to see a cross between responsive design and AR, but here ya go:
A silly mashup of HTML5 technologies: We use the canvas to capture the contents of a video element. The canvas then identifies the blue markers and overlays an iframe on top of it. The iframe contains our website (upperdog.se) which has a responsive design.