-prefix-free let you use only unprefixed CSS properties everywhere. It works behin the scene, adding the current browser’s prefix to any CSS code, only when it’s needed.
my advice : It would be a great tool but it’s only compatible with IE9+, Opera 10+, Firefox 3.5+, Safari 4+ and Chrome. The lack of backward compatibility is really pain in the ass and you may consider using other tools like less or saas.
Automatically adapts your existing HTML images for mobile devices. No mark-up changes needed. Just drop it in and forget about it.