Compatiblizr
·
Plugin for patching old versions of IE (7 and 8)to work with CSS3 selectors and Media Queries.
IE 7 and 8 don’t do CSS3 or Media queries so instead of adding the fixes to your theme you can add them via a plugin. This means when they finally die a death you can drop support without having to update your theme. This also covers purchased themes so you don’t need to alter the actual files.