Quixel just released version 2 of their suite of products. Quixel Suite is composed of:
You can currently purchase the entire suite for $99 on an indie license or $409 on a commercial license, which represents a 25% savings.
As to what Quixel actually is, it’s a texturing solution that bring PBR (Physically Based Rendering) to Photoshop. Their own promo video probably illustrates it best… just turn your speakers down before pressing play!
If you are thinking to yourself, hey, that looks a heck of a lot like Substance Painter that you just looked at, you'd be right. They provide basically the same functionality for a very similar price, but Substance is a stand alone application while Quixel integrates within Photoshop.
GameDev News, Art