Burger King's latest value play is a Mix and Match, Two for $5 promotion (last seen in March) valid on the Whopper, Original Chicken Sandwich, and Premium Alaskan Fish Sandwich. Under the promotion, you can order any combination of two of the three sandwiches/burgers for $5 at participating Burger King locations.
The Whopper normally sells for around $3.59, while the Original Chicken Sandwich is typically $3.99, and the Premium Alaskan Fish Sandwich is $3.19.
Burger King is also offering a Mother's Day deal where you can purchase a $20 eCard for Mother's Day from the Burger King website and receive a $5 eCard for free (via email). The deal only applies to online purchases and is good through this Sunday, May 12 (i.e. Mother's Day).