Pax Stellarum is a set of free wargames rules for starship battles. The author writes:
PAX STELLARUM is a spaceship Tabletop Miniature gaming ruleset designed to be able to represent ships from any Sci-Fi universe.
Players are not limited to just designing ships, but can also develop their own fighters, weapons and troops. This allows players to design different forces for each race they play with, thus better representing the diversity found in Sci-Fi universes.
The ship construction system was developed to accommodate designs from extremely different scales. Players may create functional ships of merely 1 hull point or behemoths with dozens of hull points, all of which may be fielded in the same game while keeping game play balanced.
In PAX STELLARUM, miniatures are to be used to represent each ship. Other items such as planets and asteroids make up the scenery in which fleets will clash for ultimate supremacy among the stars.