If you register your domains through Namecheap.com, entering SAVE7993 as the coupon code will knock the registration fee down from $8.88 to $7.99. I just used it today on a .com registration, but I’m guessing that it will work with other TLDs as well. I think it also lowers the price of their email service, if you’re interested in that. I have no idea if there’s an expiration date, so enjoy it while it lasts!