Amethyst: Foundations (4E) PDF

What you basically get is an extremely detailed campaign setting and rules expansion of sort for 4e. The game inherits from 4e the basic rules, human race stats, along with several fantasy classes (non-divine however), as well as some monsters from the Monster Manual. Aside from that you're pretty much in their world. Several new fey races to choose from and four new base technology classes that can cover two of the standard roles each, along with their own bestiary and of course lots of fluff about the world.

The setting itself is a nice mix of slightly futuristic and fantasy elements. If you're not into that sort of thing, it's unlikely you're going to dig it here either. It's also worth noting that canonically your players are likely to either be all on the fantasy side of the fence or all on the technology side. They follow the convention of magic and technology not getting along with mechanics to deal with the conflict.

Over all it's a really well thought out product and really helps 4e shine in a new way. Unfortunately it also highlights some of the downsides of what makes 4e popular. Good luck using the Character Builder with all of these lovely new options. But building one by hand isn't that bad either, and it's done in plenty of other games all the time!