There's a case for free actions used even when it's not your turn (speaking, for instance).
I never used my claws on my Sorcerer (and with a 7 STR why would I?) but a free action is something you can do an unlimited number of time per round, at least by our interpretation, so popping your claws wouldn't take up any of your actions like loading a crossbow or preparing a spell or anything.
At 1st level, you can grow claws as a free action... You can use your claws for a number of rounds per day equal to 3 + your Charisma modifier.
Where does it say you can speak when it's not your turn?
Where does it say you can speak when it's not your turn?
So yeah. No more waiting until your turn to say "ow" after being hit by that fireball or sneak attack!Speak
In general, speaking is a free action that you can perform even when it isn't your turn. Speaking more than a few sentences is generally beyond the limit of a free action.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.