StackSocial offers a $50 Incase Accessories Credit for $25. Even better, this voucher includes free shipping. That's among the the best such credit deals we've seen for Incase, which sells cases and sleeves for Apple laptops as well as iPhones, iPads, and more. (We saw a $70 credit for $35 in July.) Some conditions may apply. The credit expires December 20; deal ends August 18.