Daggerheart
Adversary & Environment cards, built from the Daggerheart SRD under the Darrington Press Community Gaming License.
D&D 5E
Creature statblock cards, built from the 5E SRD (5.1 / 5.2), released by Wizards of the Coast under Creative Commons CC-BY-4.0.
Pathfinder 2E
Creature statblock cards, built from Pathfinder Second Edition rules text released under the ORC License.