Essence Core
The Essence RPG system has been developed since 2000 and used in fantasy¸ adventure¸ war and pulp SF in settings from spirit-haunted Iron Age empires to star-spanning federations.
This fully playable¸ free set of the core rules is an introduction to the system.
Rocket Jocks¸ a pulp SF implementation¸ and Vis Imperium Victoriana¸ a 19th-century pulp game¸ are available at low cost through DrivethruRPG and Brittannia Game Designs' website