Star Wars RPG
West End Games' Star Wars is a fun, easy-to-learn system. Because of this, people hate it and avoid it like the plague.
There were a lot of supplements and modules made for the system; you can see them all here.
The system:
Every character has six attributes: Strength (punchin' and liftin'), Dexterity (shootin' and dodgin'), Perception (lookin'), Knowledge (knowin'), Mechanical (drivin', bantha ridin'), and Technical (droid fixin'). These are rated by how many dice are in them; an average human character has a Strength of 3D, which means she rolls 3d6 every time she makes a Strength check.
NPC characters get 12D to divide between their attributes, and PCs (or important NPCs) get 18D. The minimum attribute rating for a human is 2D, and the max (for a human) is 4D.
Skills are rated the same way, but the cap on a skill is 13D. Characters get 7D to put into skills at character creation.
Example:
If you have a bounty hunter character with a blaster skill of 5D, you roll 5d6 every time you shoot at something. If the GM decides that you rolled high enough to hit (usually 10-15 is good enough), the other character rolls a Strength check (and adds on any dice they get for wearing armor). If their roll's total is higher, they shrug it off; if the attacker's roll is higher, the victim gets hurt (and depending on how crappy they rolled, they might die).