The designs created by Sandra Boynton became very well known, especially her "Hippo Birdie Two Ewes" birthday card.
These design styles were eventually adopted by the competition and are common today.
Artists like Bald Guy Greetings (Ian Kalman and Sean Farrell), Across The Line Products, Mary Melcher, Cynthia Bainton (granddaughter of Roland Bainton), John Richard Allen, the Bjorkman Brothers, Kathy Davis, Dan Reynolds, David Walker, Susan Allen, Vicky Barone and cartoonist Cathy Guisewite also produce or have produced greeting cards through RPG.
The Product Development Group of Andrews McMeel Publishing also contributes significantly to the RPG offering through a line of original concepts called Zero Gravity and well-known licenses like Napoleon Dynamite, Little Miss Sunshine and the Close to Home cartoon panel.
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