In HP and the Philosopher's Stone, Harry gets an invisibility cloak as a Christmas present from Dumbledore. (His father had owned it before.)
As soon as Ron saw it, he recognised it to be as an invisibility cloak (which we later get to know is one of the deathly hallows), and he says they are incredibly rare. Which indicates that there has been more than one IC in the Potterverse. Is it mentioned anywhere in the books or movies about any other invisibility cloak? If yes then how do they work? And are they as effective as the one with Harry? Please give a canon answer.