The Player's Guide is good and it has a lot of optional rules in it. One of which I particullarily liked was where the kings and nobles had divine protection.
The feats are very varied, and all seem to give some more flavour than those from the PhB. Their balance and qualities are a bit more unsteady, though. For instance, there's a feat that gives you a bonus to your saves equal to your Con bonus. Stuff like that.
I didn't think the extra core classes were particullarily well thought out. Some of them are more like variations of the rogue or fighters.
Sorry I don't remember the spells right now...
The campaign sourcebook - very good (I've read somewhere it was written by underpaid russian women, but hey the result is fantastic)...
Kalamar is a lovely campaign. Low magic. Such a shame I never got to play in it...