Boonta Eve Classic is a set of free wargmes rules for pod racing in the Star Wars Universe. The rules are designed for use with those old Galoob Micromachines, which can still be had for a reasonable price on Ebay:
Star Wars
Star Wars – The Force Awakens
Totally Geeking.
Star Wars Shootout
Star Wars Shootout is a set of free wargames rules for skirmish combat in the Star Wars universe.
Cheap Wargaming Terrain For Star Wars Legion And Other Science Fiction Games
This video has some really nice ideas for making cheap terrain for Star Wars Legion and other science fiction games.
Star Wars Full Thrust Rules
Full Thrust is an excellent set of starship combat rules — my personal favorite, in fact. Here are a set of modifications and statistics for playing Star Wars battles.