Star Wars Saga Edition (and to a lesser extent, Fourth Edition) did this for your saves:
- Fortitude: 10 + your level + your Con mod (or Str mod if you are a droid) + armor bonus + class bonus (+1 for Jedi and scouts, +2 for soldiers)
- Reflex: 10 + your level or your armor bonus + your Dex modifier (limited by armor) + class bonus (+1 for Jedi, nobles, and soldiers, +2 for scoundrels and scouts)
- Will: 10 + your level + your Wis modifier + class bonus (+1 for Jedi and scoundrels, +2 for nobles)
These were, however, rolled against by the attacker instead of rolled by the player. As much as I like treating Fort/Ref/Will as similar to AC (Heck, your Reflex Defense in Saga WAS your Armor Class) I can kinda understand why letting the player roll his save is a good idea.