Drop Dead Studios
Drop Dead Studios develops material for tabletop roleplaying games such as Pathfinder 1st and 2nd edition, Dungeons and Dragons 5th edition, and more (one day).
For Pathfinder 1st edition, the definitive Spheres magic system.
A martial spheres system for Pathfinder 1st edition
Mythic rules for using Spheres of Power
Options for combining Spheres of Power and Spheres of Might