Look in the resources section. But that's not a good idea at all, better to build up your own collection by going to planet renders and all the brush sites. Otherwise you end up with gigs and gigs of stuff you never use and don't even like.
I have one that's really cool. Look it up on youtube. They have the best ones. Just make sure you do the ones at the top with the most subscribers because if their subscribed to them then they most likely work n dont have any viruses