Forbidden Kingdoms

Forbidden Kingdoms is a Pulp magazine-inspired setting for "Dungeons & Dragons" and "d20 Modern", written by R. Hyrum Savage and Dave Webb, and published by OtherWorld Creations. 
"Forbidden Kingdoms" is set on an alternate history Earth, between the years 1889 and 1939. The setting includes rules for magic, psionics and martial arts, as well as weird science.