XtremeGuard cuts 80% off sitewide on its protective screens and cases via coupon code "80off". Even better, all orders qualify for free shipping. With no minimum purchase requirement, that trumps our mention from two weeks ago (in which we saw 60% off sitewide) and is tied for the best sitewide discount we've seen from XtremeGuard. (We've seen as much as 83% off, but that promo required the purchase of three or more items.)