Lori Holt of Bee in my Bonnet has created 33 Bee Happy templates for an endless variety of designs using your applique method of choice. Made of sturdy plastic, they have center marks and are see-through for fussy cutting.
Pick up some of Lori's Sew Cute Rulers, they come in pink, blue, and green, they would be perfect for using with the Sew Simple Shapes.
Photo Credits go to Lori Holt. Check out her blog, Bee in my Bonnet, for more pictures using these Sew Simple Shapes.