Crocs is running a Buy One Get One Free Deal @ Crocs.com Outlet. No coupon code needed.
If you've never signed up for Crocs.com emails this is a great time to do it. They will email you a code for 20% off which will probably be valid with the upcoming BOGO sale.
Don't forget to log on to Ebates first and earn 7.5% back on your Crocs purchase + $5 cash back for new members.