War In Space is a set of free wargames rules for star ship combat. What makes it different is that it uses standard playing cards for giving orders.
starships
Tacship Space Fighter Combat Rules
Tacship is a set of free wargames rules for space combat by John Tuffley. He writes:
Tacship is a simplified fast-play rules system for simulating combat between manned space fighters. The game may be played on a hex grid map or on a plain table area by substituting inches for hexes and measuring turns in 60 degree increments (the same as a one hexside facing change). Fighter models should be mounted on stands, preferably with a one inch hex base, if a grid is being used.
Full Thrust Cross Dimensions
Full Thrust Cross Dimensions is a Full Thrust rules variant. It brings together rules from the various books and tries out some new ideas.
Hostile Stars Science Fiction Fleet Actions
Hostile Stars is a set of free wargames rules for fighting fleet actions in the Dark Realms universe.
Pacwar Space Dogfighting Rules
Pacwar is a set of rules for large scale dogfights in “The Universe.”