Some useful links:
http://css-tricks.com/which-responsive-images-solution-should-you-use/
https://github.com/scottjehl/picturefill
http://www.standardista.com/responsive-images-clown-car-technique/
http://www.w3.org/community/respimg/
Hammer.js http://eightmedia.github.io/hammer.js/
Sencha gestures http://www.sencha.com/blog/ext-js-on-tap/