are there ways to replenish rage rounds?

[Ishpumalibu]

I thought i remembered there being a feat that could do this or something.

[MrSin]

Destroyer's Blessing? A few of the barbarian archetypes pick up a way to gain rage rounds, though none in particular jump out at me atm.

[Valeros 878]

Thrill of the Kill feat for orcs and half-orcs

[Deadmanwalking]

Barbarian Chew doesn't replenish rounds, but it sure provides extra ones cheap.

[Ishpumalibu]

Thanks guys. That helps out a lot.

[Claxon]

Elemental Kin archetype will allow you to gain rounds of rage by taking elemental damage. Though, it's not necessarily a reliable method.