Savage Worlds uses varying die-types to represent attribute quality. For instance, a low skill would be represented by a d4, a high skill by a d12.
Savage Worlds uses a metagame currency called "Bennies" to allow players to modify rolls and exercise some narrative control. A game master gives bennies when the player accomplish something related to his character background or disadvantage. A bennie can be used in many way including going first in initiative.
Initiative uses playing card and an Ace let you act when you want.
It is a point-build attribute-and-skill system, rather than a class-and-level system.
It is well supported by both official and community-created settings, conversions, and other content.