Groupon offers a $50 Speck Credit for Smartphone, Laptop, and Tablet Accessories for $25. Plus, all orders qualify for free shipping. That's tied with our mention from two weeks ago as the best deal we've seen from Speck, which sells decorative and shock-absorbent accessories for the iPhone, Samsung smartphones, and Amazon Kindle. Credit expires November 30, 2013. Deal ends August 19 at 2:59 am ET.